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56 vulnerabilities by istio
CVE-2026-41413 (GCVE-0-2026-41413)
Vulnerability from nvd – Published: 2026-05-07 04:18 – Updated: 2026-05-07 12:59
VLAI
EPSS
VEX
Title
Istio Vulnerable to SSRF via RequestAuthentication jwksUri
Summary
Istio is an open platform to connect, manage, and secure microservices. Prior to versions 1.28.6 and 1.29.2, when a RequestAuthentication resource is created with a jwksUri pointing to an internal service, istiod makes an unauthenticated HTTP GET request to that URL without filtering out localhost or link local ips. This can result in sensitive data being distributed to Envoy proxies via xDS configuration. This issue has been patched in versions 1.28.6 and 1.29.2.
Severity
5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-07 12:59 UTC
CWE
- CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/istio/istio/security/advisorie… | x_refsource_CONFIRM |
| https://github.com/istio/istio/releases/tag/1.28.6 | x_refsource_MISC |
| https://github.com/istio/istio/releases/tag/1.29.2 | x_refsource_MISC |
Impacted products
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},
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CVE-2026-39350 (GCVE-0-2026-39350)
Vulnerability from nvd – Published: 2026-04-15 22:42 – Updated: 2026-04-16 12:04
VLAI
EPSS
VEX
Title
Istio AuthorizationPolicy Incorrect Regex Matching of Dots in serviceAccounts Fields Allows Policy Bypass
Summary
Istio is an open platform to connect, manage, and secure microservices. In versions 1.25.0 through 1.27.8, 1.28.0 through 1.28.5, 1.29.0, and 1.29.1, the serviceAccounts and notServiceAccounts fields in AuthorizationPolicy incorrectly interpret dots (.) as a regular expression matcher. Because . is a valid character in a service account name, an AuthorizationPolicy ALLOW rule targeting a service account such as cert-manager.io also matches cert-manager-io, cert-managerXio, etc. A DENY rule targeting the same name fails to block those variants. Fixes are available in versions 1.29.2, 1.28.6, and 1.27.9.
Severity
5.4 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-16 11:13 UTC
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/istio/istio/security/advisorie… | x_refsource_CONFIRM |
Impacted products
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CVE-2026-31838 (GCVE-0-2026-31838)
Vulnerability from nvd – Published: 2026-03-10 21:58 – Updated: 2026-04-07 02:39
VLAI
EPSS
VEX
Title
Istio HTTP debug endpoints on port 15014 to enforce namespace-based authorization, preventing cross-namespace proxy data access.
Summary
Istio is an open platform to connect, manage, and secure microservices. Prior to 1.29.1, 1.28.5, and 1.27.8, a vulnerability in Envoy RBAC header matching could allow authorization policy bypass when policies rely on HTTP headers that may contain multiple values. An attacker could craft requests with multiple header values in a way that causes Envoy to evaluate the header differently than intended, potentially bypassing authorization checks. This may allow unauthorized requests to reach protected services when policies depend on such header-based matching conditions. This vulnerability is fixed in 1.29.1, 1.28.5, and 1.27.8.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-11 13:53 UTC
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/istio/istio/security/advisorie… | x_refsource_CONFIRM |
| https://github.com/istio/istio/commit/004fd692131… | x_refsource_MISC |
Impacted products
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CVE-2026-31837 (GCVE-0-2026-31837)
Vulnerability from nvd – Published: 2026-03-10 21:57 – Updated: 2026-07-20 12:04
VLAI
EPSS
VEX
Title
Istio JWKS resolver to prevent private key material from being exposed when JWKS fetch fails.
Summary
Istio is an open platform to connect, manage, and secure microservices. Prior to 1.29.1, 1.28.5, and 1.27.8, a user of Istio is impacted if the JWKS resolver becomes unavailable or the fetch fails, exposing hardcoded defaults regardless of use of the RequestAuthentication resource. This vulnerability is fixed in 1.29.1, 1.28.5, and 1.27.8.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-11 15:53 UTC
CWE
Assigner
References
8 references
| URL | Tags |
|---|---|
| https://github.com/istio/istio/security/advisorie… | x_refsource_CONFIRM |
| https://access.redhat.com/security/cve/CVE-2026-31837 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2446344 | issue-trackingx_refsource_REDHAT |
| https://security.access.redhat.com/data/csaf/v2/v… | x_sadp-csaf-vex |
| https://access.redhat.com/errata/RHSA-2026:10184 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:5948 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:5950 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:5952 | vendor-advisoryx_refsource_REDHAT |
Impacted products
18 products
| Vendor | Product | Version | |
|---|---|---|---|
| istio | istio |
Affected:
>= 1.29.0-alpha.0, < 1.29.1
Affected: >= 1.28.0-alpha.0, < 1.28.5 Affected: < 1.27.8 |
|
| Red Hat | Red Hat OpenShift AI 2.25 |
Unaffected:
1776343082 , < *
(rpm)
cpe:/a:redhat:openshift_ai:2.25::el9 |
|
| Red Hat | Red Hat OpenShift AI 2.25 |
Unaffected:
1776343105 , < *
(rpm)
cpe:/a:redhat:openshift_ai:2.25::el9 |
|
| Red Hat | Red Hat OpenShift AI 2.25 |
Unaffected:
1776343121 , < *
(rpm)
cpe:/a:redhat:openshift_ai:2.25::el9 |
|
| Red Hat | Red Hat OpenShift Service Mesh 3.0 |
Unaffected:
1774006090 , < *
(rpm)
cpe:/a:redhat:service_mesh:3.0::el9 |
|
| Red Hat | Red Hat OpenShift Service Mesh 3.0 |
Unaffected:
1774068855 , < *
(rpm)
cpe:/a:redhat:service_mesh:3.0::el9 |
|
| Red Hat | Red Hat OpenShift Service Mesh 3.1 |
Unaffected:
1774037369 , < *
(rpm)
cpe:/a:redhat:service_mesh:3.1::el9 |
|
| Red Hat | Red Hat OpenShift Service Mesh 3.1 |
Unaffected:
1774244136 , < *
(rpm)
cpe:/a:redhat:service_mesh:3.1::el9 |
|
| Red Hat | Red Hat OpenShift Service Mesh 3.2 |
Unaffected:
1774206464 , < *
(rpm)
cpe:/a:redhat:service_mesh:3.2::el9 |
|
| Red Hat | Red Hat OpenShift Service Mesh 3.2 |
Unaffected:
1774114903 , < *
(rpm)
cpe:/a:redhat:service_mesh:3.2::el9 |
|
| Red Hat | cert-manager Operator for Red Hat OpenShift |
cpe:/a:redhat:cert_manager:1
|
|
| Red Hat | ExternalDNS Operator |
cpe:/a:redhat:ext_dns_optr:1
|
|
| Red Hat | OpenShift Serverless |
cpe:/a:redhat:serverless:1
|
|
| Red Hat | OpenShift Service Mesh 2 |
cpe:/a:redhat:service_mesh:2
|
|
| Red Hat | OpenShift Service Mesh 3 |
cpe:/a:redhat:service_mesh:3
|
|
| Red Hat | Red Hat Ansible Automation Platform 2 |
cpe:/a:redhat:ansible_automation_platform:2
|
|
| Red Hat | Red Hat Connectivity Link 1 |
cpe:/a:redhat:connectivity_link:1
|
|
| Red Hat | Red Hat OpenShift AI (RHOAI) |
cpe:/a:redhat:openshift_ai
|
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CVE-2023-44487 (GCVE-0-2023-44487)
Vulnerability from nvd – Published: 2023-10-10 00:00 – Updated: 2026-07-14 12:03Summary
The HTTP/2 protocol allows a denial of service (server resource consumption) because request cancellation can reset many streams quickly, as exploited in the wild in August through October 2023.
Severity
7.5 (High)
SSVC
Exploitation: active
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-07-23 20:34 UTC
CWE
- n/a
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
173 references
Impacted products
6 products
| Vendor | Product | Version | |
|---|---|---|---|
| ietf | http |
Affected:
2.0
cpe:2.3:a:ietf:http:2.0:*:*:*:*:*:*:* |
|
| Siemens | RUGGEDCOM APE1808 |
Affected:
0 , < *
(custom)
|
|
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP |
Affected:
V3.1.5 , < *
(custom)
|
|
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP |
Affected:
V3.1.5 , < *
(custom)
|
|
| Siemens | SINEC NMS |
Affected:
0 , < V3.0
(custom)
|
|
| Siemens | SIPLUS S7-1500 CPU 1518-4 PN/DP MFP |
Affected:
V3.1.5 , < *
(custom)
|
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CVE-2022-39388 (GCVE-0-2022-39388)
Vulnerability from nvd – Published: 2022-11-10 00:00 – Updated: 2025-04-23 16:39
VLAI
EPSS
VEX
Title
Istio may allow identity impersonation if user has localhost access
Summary
Istio is an open platform to connect, manage, and secure microservices. In versions on the 1.15.x branch prior to 1.15.3, a user can impersonate any workload identity within the service mesh if they have localhost access to the Istiod control plane. Version 1.15.3 contains a patch for this issue. There are no known workarounds.
Severity
7.6 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-23 13:55 UTC
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
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CVE-2022-39278 (GCVE-0-2022-39278)
Vulnerability from nvd – Published: 2022-10-13 00:00 – Updated: 2025-04-23 16:50
VLAI
EPSS
VEX
Title
Istio vulnerable to denial of service attack due to Golang Regex Library
Summary
Istio is an open platform-independent service mesh that provides traffic management, policy enforcement, and telemetry collection. Prior to versions 1.15.2, 1.14.5, and 1.13.9, the Istio control plane, istiod, is vulnerable to a request processing error, allowing a malicious attacker that sends a specially crafted or oversized message which results in the control plane crashing when the Kubernetes validating or mutating webhook service is exposed publicly. This endpoint is served over TLS port 15017, but does not require any authentication from the attacker. For simple installations, Istiod is typically only reachable from within the cluster, limiting the blast radius. However, for some deployments, especially external istiod topologies, this port is exposed over the public internet. Versions 1.15.2, 1.14.5, and 1.13.9 contain patches for this issue. There are no effective workarounds, beyond upgrading. This bug is due to an error in `regexp.Compile` in Go.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-23 15:50 UTC
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
Impacted products
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CVE-2022-31045 (GCVE-0-2022-31045)
Vulnerability from nvd – Published: 2022-06-09 20:55 – Updated: 2025-04-23 18:17
VLAI
EPSS
VEX
Title
Ill-formed headers may lead to unexpected behavior in Istio
Summary
Istio is an open platform to connect, manage, and secure microservices. In affected versions ill-formed headers sent to Envoy in certain configurations can lead to unexpected memory access resulting in undefined behavior or crashing. Users are most likely at risk if they have an Istio ingress Gateway exposed to external traffic. This vulnerability has been resolved in versions 1.12.8, 1.13.5, and 1.14.1. Users are advised to upgrade. There are no known workarounds for this issue.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-23 14:05 UTC
CWE
- CWE-125 - Out-of-bounds Read
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/istio/istio/security/advisorie… | x_refsource_CONFIRM |
| https://istio.io/latest/news/security/istio-secur… | x_refsource_MISC |
Impacted products
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CVE-2022-24726 (GCVE-0-2022-24726)
Vulnerability from nvd – Published: 2022-03-10 20:45 – Updated: 2025-04-23 18:55
VLAI
EPSS
VEX
Title
Unauthenticated control plane denial of service attack in Istio
Summary
Istio is an open platform to connect, manage, and secure microservices. In affected versions the Istio control plane, istiod, is vulnerable to a request processing error, allowing a malicious attacker that sends a specially crafted message which results in the control plane crashing when the validating webhook for a cluster is exposed publicly. This endpoint is served over TLS port 15017, but does not require any authentication from the attacker. For simple installations, Istiod is typically only reachable from within the cluster, limiting the blast radius. However, for some deployments, especially [external istiod](https://istio.io/latest/docs/setup/install/external-controlplane/) topologies, this port is exposed over the public internet. This issue has been patched in versions 1.13.2, 1.12.5 and 1.11.8. Users are advised to upgrade. Users unable to upgrade should disable access to a validating webhook that is exposed to the public internet or restrict the set of IP addresses that can query it to a set of known, trusted entities.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-23 15:56 UTC
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/istio/istio/security/advisorie… | x_refsource_CONFIRM |
| https://github.com/golang/go/issues/51112 | x_refsource_MISC |
| https://github.com/istio/istio/commit/6ca5055a4db… | x_refsource_MISC |
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CVE-2022-23635 (GCVE-0-2022-23635)
Vulnerability from nvd – Published: 2022-02-22 22:00 – Updated: 2025-04-23 19:02
VLAI
EPSS
VEX
Title
Unauthenticated control plane denial of service attack in Istio
Summary
Istio is an open platform to connect, manage, and secure microservices. In affected versions the Istio control plane, `istiod`, is vulnerable to a request processing error, allowing a malicious attacker that sends a specially crafted message which results in the control plane crashing. This endpoint is served over TLS port 15012, but does not require any authentication from the attacker. For simple installations, Istiod is typically only reachable from within the cluster, limiting the blast radius. However, for some deployments, especially [multicluster](https://istio.io/latest/docs/setup/install/multicluster/primary-remote/) topologies, this port is exposed over the public internet. There are no effective workarounds, beyond upgrading. Limiting network access to Istiod to the minimal set of clients can help lessen the scope of the vulnerability to some extent.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-23 15:57 UTC
CWE
- CWE-287 - Improper Authentication
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/istio/istio/security/advisorie… | x_refsource_CONFIRM |
| https://github.com/istio/istio/commit/5f3b5ed958a… | x_refsource_MISC |
| https://istio.io/latest/news/security/istio-secur… | x_refsource_MISC |
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CVE-2022-21701 (GCVE-0-2022-21701)
Vulnerability from nvd – Published: 2022-01-19 21:40 – Updated: 2025-04-23 19:09
VLAI
EPSS
VEX
Title
Privileged Escalation in Istio
Summary
Istio is an open platform to connect, manage, and secure microservices. In versions 1.12.0 and 1.12.1 Istio is vulnerable to a privilege escalation attack. Users who have `CREATE` permission for `gateways.gateway.networking.k8s.io` objects can escalate this privilege to create other resources that they may not have access to, such as `Pod`. This vulnerability impacts only an Alpha level feature, the Kubernetes Gateway API. This is not the same as the Istio Gateway type (gateways.networking.istio.io), which is not vulnerable. Users are advised to upgrade to resolve this issue. Users unable to upgrade should implement any of the following which will prevent this vulnerability: Remove the gateways.gateway.networking.k8s.io CustomResourceDefinition, set PILOT_ENABLE_GATEWAY_API_DEPLOYMENT_CONTROLLER=true environment variable in Istiod, or remove CREATE permissions for gateways.gateway.networking.k8s.io objects from untrusted users.
Severity
5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-23 14:11 UTC
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
2 references
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CVE-2022-21679 (GCVE-0-2022-21679)
Vulnerability from nvd – Published: 2022-01-19 21:35 – Updated: 2025-04-23 19:10
VLAI
EPSS
VEX
Title
Authorization Policy bypass in Istio
Summary
Istio is an open platform to connect, manage, and secure microservices. In Istio 1.12.0 and 1.12.1 The authorization policy with hosts and notHosts might be accidentally bypassed for ALLOW action or rejected unexpectedly for DENY action during the upgrade from 1.11 to 1.12.0/1.12.1. Istio 1.12 supports the hosts and notHosts fields in authorization policy with a new Envoy API shipped with the 1.12 data plane. A bug in the 1.12.0 and 1.12.1 incorrectly uses the new Envoy API with the 1.11 data plane. This will cause the hosts and notHosts fields to be always matched regardless of the actual value of the host header when mixing 1.12.0/1.12.1 control plane and 1.11 data plane. Users are advised to upgrade or to not mix the 1.12.0/1.12.1 control plane with 1.11 data plane if using hosts or notHosts field in authorization policy.
Severity
6.8 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-23 15:56 UTC
CWE
- CWE-670 - Always-Incorrect Control Flow Implementation
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/istio/istio/security/advisorie… | x_refsource_CONFIRM |
| https://istio.io/latest/news/releases/1.12.x/anno… | x_refsource_MISC |
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CVE-2021-39156 (GCVE-0-2021-39156)
Vulnerability from nvd – Published: 2021-08-24 22:30 – Updated: 2024-08-04 01:58
VLAI
EPSS
VEX
Title
Fragments in Path May Lead to Authorization Policy Bypass
Summary
Istio is an open source platform for providing a uniform way to integrate microservices, manage traffic flow across microservices, enforce policies and aggregate telemetry data. Istio 1.11.0, 1.10.3 and below, and 1.9.7 and below contain a remotely exploitable vulnerability where an HTTP request with `#fragment` in the path may bypass Istio’s URI path based authorization policies. Patches are available in Istio 1.11.1, Istio 1.10.4 and Istio 1.9.8. As a work around a Lua filter may be written to normalize the path.
Severity
8.1 (High)
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/istio/istio/security/advisorie… | x_refsource_CONFIRM |
| https://istio.io/latest/news/security/istio-secur… | x_refsource_MISC |
Impacted products
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CVE-2021-39155 (GCVE-0-2021-39155)
Vulnerability from nvd – Published: 2021-08-24 22:25 – Updated: 2024-08-04 01:58
VLAI
EPSS
VEX
Title
Authorization Policy Bypass Due to Case Insensitive Host Comparison
Summary
Istio is an open source platform for providing a uniform way to integrate microservices, manage traffic flow across microservices, enforce policies and aggregate telemetry data. According to [RFC 4343](https://datatracker.ietf.org/doc/html/rfc4343), Istio authorization policy should compare the hostname in the HTTP Host header in a case insensitive way, but currently the comparison is case sensitive. The proxy will route the request hostname in a case-insensitive way which means the authorization policy could be bypassed. As an example, the user may have an authorization policy that rejects request with hostname "httpbin.foo" for some source IPs, but the attacker can bypass this by sending the request with hostname "Httpbin.Foo". Patches are available in Istio 1.11.1, Istio 1.10.4 and Istio 1.9.8. As a work around a Lua filter may be written to normalize Host header before the authorization check. This is similar to the Path normalization presented in the [Security Best Practices](https://istio.io/latest/docs/ops/best-practices/security/#case-normalization) guide.
Severity
8.3 (High)
CWE
- CWE-178 - Improper Handling of Case Sensitivity
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/istio/istio/security/advisorie… | x_refsource_CONFIRM |
| https://datatracker.ietf.org/doc/html/rfc4343 | x_refsource_MISC |
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CVE-2021-34824 (GCVE-0-2021-34824)
Vulnerability from nvd – Published: 2021-06-29 13:30 – Updated: 2024-08-04 00:26
VLAI
EPSS
VEX
Summary
Istio (1.8.x, 1.9.0-1.9.5 and 1.10.0-1.10.1) contains a remotely exploitable vulnerability where credentials specified in the Gateway and DestinationRule credentialName field can be accessed from different namespaces.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/istio/istio/releases | x_refsource_MISC |
| https://istio.io/latest/news/security/istio-secur… | x_refsource_MISC |
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CVE-2026-41413 (GCVE-0-2026-41413)
Vulnerability from cvelistv5 – Published: 2026-05-07 04:18 – Updated: 2026-05-07 12:59
VLAI
EPSS
VEX
Title
Istio Vulnerable to SSRF via RequestAuthentication jwksUri
Summary
Istio is an open platform to connect, manage, and secure microservices. Prior to versions 1.28.6 and 1.29.2, when a RequestAuthentication resource is created with a jwksUri pointing to an internal service, istiod makes an unauthenticated HTTP GET request to that URL without filtering out localhost or link local ips. This can result in sensitive data being distributed to Envoy proxies via xDS configuration. This issue has been patched in versions 1.28.6 and 1.29.2.
Severity
5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-07 12:59 UTC
CWE
- CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/istio/istio/security/advisorie… | x_refsource_CONFIRM |
| https://github.com/istio/istio/releases/tag/1.28.6 | x_refsource_MISC |
| https://github.com/istio/istio/releases/tag/1.29.2 | x_refsource_MISC |
Impacted products
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CVE-2026-39350 (GCVE-0-2026-39350)
Vulnerability from cvelistv5 – Published: 2026-04-15 22:42 – Updated: 2026-04-16 12:04
VLAI
EPSS
VEX
Title
Istio AuthorizationPolicy Incorrect Regex Matching of Dots in serviceAccounts Fields Allows Policy Bypass
Summary
Istio is an open platform to connect, manage, and secure microservices. In versions 1.25.0 through 1.27.8, 1.28.0 through 1.28.5, 1.29.0, and 1.29.1, the serviceAccounts and notServiceAccounts fields in AuthorizationPolicy incorrectly interpret dots (.) as a regular expression matcher. Because . is a valid character in a service account name, an AuthorizationPolicy ALLOW rule targeting a service account such as cert-manager.io also matches cert-manager-io, cert-managerXio, etc. A DENY rule targeting the same name fails to block those variants. Fixes are available in versions 1.29.2, 1.28.6, and 1.27.9.
Severity
5.4 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-16 11:13 UTC
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/istio/istio/security/advisorie… | x_refsource_CONFIRM |
Impacted products
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CVE-2026-31838 (GCVE-0-2026-31838)
Vulnerability from cvelistv5 – Published: 2026-03-10 21:58 – Updated: 2026-04-07 02:39
VLAI
EPSS
VEX
Title
Istio HTTP debug endpoints on port 15014 to enforce namespace-based authorization, preventing cross-namespace proxy data access.
Summary
Istio is an open platform to connect, manage, and secure microservices. Prior to 1.29.1, 1.28.5, and 1.27.8, a vulnerability in Envoy RBAC header matching could allow authorization policy bypass when policies rely on HTTP headers that may contain multiple values. An attacker could craft requests with multiple header values in a way that causes Envoy to evaluate the header differently than intended, potentially bypassing authorization checks. This may allow unauthorized requests to reach protected services when policies depend on such header-based matching conditions. This vulnerability is fixed in 1.29.1, 1.28.5, and 1.27.8.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-11 13:53 UTC
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/istio/istio/security/advisorie… | x_refsource_CONFIRM |
| https://github.com/istio/istio/commit/004fd692131… | x_refsource_MISC |
Impacted products
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CVE-2026-31837 (GCVE-0-2026-31837)
Vulnerability from cvelistv5 – Published: 2026-03-10 21:57 – Updated: 2026-07-20 12:04
VLAI
EPSS
VEX
Title
Istio JWKS resolver to prevent private key material from being exposed when JWKS fetch fails.
Summary
Istio is an open platform to connect, manage, and secure microservices. Prior to 1.29.1, 1.28.5, and 1.27.8, a user of Istio is impacted if the JWKS resolver becomes unavailable or the fetch fails, exposing hardcoded defaults regardless of use of the RequestAuthentication resource. This vulnerability is fixed in 1.29.1, 1.28.5, and 1.27.8.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-11 15:53 UTC
CWE
Assigner
References
8 references
| URL | Tags |
|---|---|
| https://github.com/istio/istio/security/advisorie… | x_refsource_CONFIRM |
| https://access.redhat.com/security/cve/CVE-2026-31837 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2446344 | issue-trackingx_refsource_REDHAT |
| https://security.access.redhat.com/data/csaf/v2/v… | x_sadp-csaf-vex |
| https://access.redhat.com/errata/RHSA-2026:10184 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:5948 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:5950 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:5952 | vendor-advisoryx_refsource_REDHAT |
Impacted products
18 products
| Vendor | Product | Version | |
|---|---|---|---|
| istio | istio |
Affected:
>= 1.29.0-alpha.0, < 1.29.1
Affected: >= 1.28.0-alpha.0, < 1.28.5 Affected: < 1.27.8 |
|
| Red Hat | Red Hat OpenShift AI 2.25 |
Unaffected:
1776343082 , < *
(rpm)
cpe:/a:redhat:openshift_ai:2.25::el9 |
|
| Red Hat | Red Hat OpenShift AI 2.25 |
Unaffected:
1776343105 , < *
(rpm)
cpe:/a:redhat:openshift_ai:2.25::el9 |
|
| Red Hat | Red Hat OpenShift AI 2.25 |
Unaffected:
1776343121 , < *
(rpm)
cpe:/a:redhat:openshift_ai:2.25::el9 |
|
| Red Hat | Red Hat OpenShift Service Mesh 3.0 |
Unaffected:
1774006090 , < *
(rpm)
cpe:/a:redhat:service_mesh:3.0::el9 |
|
| Red Hat | Red Hat OpenShift Service Mesh 3.0 |
Unaffected:
1774068855 , < *
(rpm)
cpe:/a:redhat:service_mesh:3.0::el9 |
|
| Red Hat | Red Hat OpenShift Service Mesh 3.1 |
Unaffected:
1774037369 , < *
(rpm)
cpe:/a:redhat:service_mesh:3.1::el9 |
|
| Red Hat | Red Hat OpenShift Service Mesh 3.1 |
Unaffected:
1774244136 , < *
(rpm)
cpe:/a:redhat:service_mesh:3.1::el9 |
|
| Red Hat | Red Hat OpenShift Service Mesh 3.2 |
Unaffected:
1774206464 , < *
(rpm)
cpe:/a:redhat:service_mesh:3.2::el9 |
|
| Red Hat | Red Hat OpenShift Service Mesh 3.2 |
Unaffected:
1774114903 , < *
(rpm)
cpe:/a:redhat:service_mesh:3.2::el9 |
|
| Red Hat | cert-manager Operator for Red Hat OpenShift |
cpe:/a:redhat:cert_manager:1
|
|
| Red Hat | ExternalDNS Operator |
cpe:/a:redhat:ext_dns_optr:1
|
|
| Red Hat | OpenShift Serverless |
cpe:/a:redhat:serverless:1
|
|
| Red Hat | OpenShift Service Mesh 2 |
cpe:/a:redhat:service_mesh:2
|
|
| Red Hat | OpenShift Service Mesh 3 |
cpe:/a:redhat:service_mesh:3
|
|
| Red Hat | Red Hat Ansible Automation Platform 2 |
cpe:/a:redhat:ansible_automation_platform:2
|
|
| Red Hat | Red Hat Connectivity Link 1 |
cpe:/a:redhat:connectivity_link:1
|
|
| Red Hat | Red Hat OpenShift AI (RHOAI) |
cpe:/a:redhat:openshift_ai
|
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"vendor": "Red Hat"
},
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],
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"product": "cert-manager Operator for Red Hat OpenShift",
"vendor": "Red Hat"
},
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"cpes": [
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],
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"product": "cert-manager Operator for Red Hat OpenShift",
"vendor": "Red Hat"
},
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CVE-2023-44487 (GCVE-0-2023-44487)
Vulnerability from cvelistv5 – Published: 2023-10-10 00:00 – Updated: 2026-07-14 12:03Summary
The HTTP/2 protocol allows a denial of service (server resource consumption) because request cancellation can reset many streams quickly, as exploited in the wild in August through October 2023.
Severity
7.5 (High)
SSVC
Exploitation: active
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-07-23 20:34 UTC
CWE
- n/a
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
173 references
Impacted products
6 products
| Vendor | Product | Version | |
|---|---|---|---|
| ietf | http |
Affected:
2.0
cpe:2.3:a:ietf:http:2.0:*:*:*:*:*:*:* |
|
| Siemens | RUGGEDCOM APE1808 |
Affected:
0 , < *
(custom)
|
|
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP |
Affected:
V3.1.5 , < *
(custom)
|
|
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP |
Affected:
V3.1.5 , < *
(custom)
|
|
| Siemens | SINEC NMS |
Affected:
0 , < V3.0
(custom)
|
|
| Siemens | SIPLUS S7-1500 CPU 1518-4 PN/DP MFP |
Affected:
V3.1.5 , < *
(custom)
|
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CVE-2022-39388 (GCVE-0-2022-39388)
Vulnerability from cvelistv5 – Published: 2022-11-10 00:00 – Updated: 2025-04-23 16:39
VLAI
EPSS
VEX
Title
Istio may allow identity impersonation if user has localhost access
Summary
Istio is an open platform to connect, manage, and secure microservices. In versions on the 1.15.x branch prior to 1.15.3, a user can impersonate any workload identity within the service mesh if they have localhost access to the Istiod control plane. Version 1.15.3 contains a patch for this issue. There are no known workarounds.
Severity
7.6 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-23 13:55 UTC
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
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CVE-2022-39278 (GCVE-0-2022-39278)
Vulnerability from cvelistv5 – Published: 2022-10-13 00:00 – Updated: 2025-04-23 16:50
VLAI
EPSS
VEX
Title
Istio vulnerable to denial of service attack due to Golang Regex Library
Summary
Istio is an open platform-independent service mesh that provides traffic management, policy enforcement, and telemetry collection. Prior to versions 1.15.2, 1.14.5, and 1.13.9, the Istio control plane, istiod, is vulnerable to a request processing error, allowing a malicious attacker that sends a specially crafted or oversized message which results in the control plane crashing when the Kubernetes validating or mutating webhook service is exposed publicly. This endpoint is served over TLS port 15017, but does not require any authentication from the attacker. For simple installations, Istiod is typically only reachable from within the cluster, limiting the blast radius. However, for some deployments, especially external istiod topologies, this port is exposed over the public internet. Versions 1.15.2, 1.14.5, and 1.13.9 contain patches for this issue. There are no effective workarounds, beyond upgrading. This bug is due to an error in `regexp.Compile` in Go.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-23 15:50 UTC
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
Impacted products
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CVE-2022-31045 (GCVE-0-2022-31045)
Vulnerability from cvelistv5 – Published: 2022-06-09 20:55 – Updated: 2025-04-23 18:17
VLAI
EPSS
VEX
Title
Ill-formed headers may lead to unexpected behavior in Istio
Summary
Istio is an open platform to connect, manage, and secure microservices. In affected versions ill-formed headers sent to Envoy in certain configurations can lead to unexpected memory access resulting in undefined behavior or crashing. Users are most likely at risk if they have an Istio ingress Gateway exposed to external traffic. This vulnerability has been resolved in versions 1.12.8, 1.13.5, and 1.14.1. Users are advised to upgrade. There are no known workarounds for this issue.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-23 14:05 UTC
CWE
- CWE-125 - Out-of-bounds Read
Assigner
References
2 references
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| https://github.com/istio/istio/security/advisorie… | x_refsource_CONFIRM |
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Impacted products
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CVE-2022-24726 (GCVE-0-2022-24726)
Vulnerability from cvelistv5 – Published: 2022-03-10 20:45 – Updated: 2025-04-23 18:55
VLAI
EPSS
VEX
Title
Unauthenticated control plane denial of service attack in Istio
Summary
Istio is an open platform to connect, manage, and secure microservices. In affected versions the Istio control plane, istiod, is vulnerable to a request processing error, allowing a malicious attacker that sends a specially crafted message which results in the control plane crashing when the validating webhook for a cluster is exposed publicly. This endpoint is served over TLS port 15017, but does not require any authentication from the attacker. For simple installations, Istiod is typically only reachable from within the cluster, limiting the blast radius. However, for some deployments, especially [external istiod](https://istio.io/latest/docs/setup/install/external-controlplane/) topologies, this port is exposed over the public internet. This issue has been patched in versions 1.13.2, 1.12.5 and 1.11.8. Users are advised to upgrade. Users unable to upgrade should disable access to a validating webhook that is exposed to the public internet or restrict the set of IP addresses that can query it to a set of known, trusted entities.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-23 15:56 UTC
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/istio/istio/security/advisorie… | x_refsource_CONFIRM |
| https://github.com/golang/go/issues/51112 | x_refsource_MISC |
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CVE-2022-23635 (GCVE-0-2022-23635)
Vulnerability from cvelistv5 – Published: 2022-02-22 22:00 – Updated: 2025-04-23 19:02
VLAI
EPSS
VEX
Title
Unauthenticated control plane denial of service attack in Istio
Summary
Istio is an open platform to connect, manage, and secure microservices. In affected versions the Istio control plane, `istiod`, is vulnerable to a request processing error, allowing a malicious attacker that sends a specially crafted message which results in the control plane crashing. This endpoint is served over TLS port 15012, but does not require any authentication from the attacker. For simple installations, Istiod is typically only reachable from within the cluster, limiting the blast radius. However, for some deployments, especially [multicluster](https://istio.io/latest/docs/setup/install/multicluster/primary-remote/) topologies, this port is exposed over the public internet. There are no effective workarounds, beyond upgrading. Limiting network access to Istiod to the minimal set of clients can help lessen the scope of the vulnerability to some extent.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-23 15:57 UTC
CWE
- CWE-287 - Improper Authentication
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/istio/istio/security/advisorie… | x_refsource_CONFIRM |
| https://github.com/istio/istio/commit/5f3b5ed958a… | x_refsource_MISC |
| https://istio.io/latest/news/security/istio-secur… | x_refsource_MISC |
Impacted products
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CVE-2022-21701 (GCVE-0-2022-21701)
Vulnerability from cvelistv5 – Published: 2022-01-19 21:40 – Updated: 2025-04-23 19:09
VLAI
EPSS
VEX
Title
Privileged Escalation in Istio
Summary
Istio is an open platform to connect, manage, and secure microservices. In versions 1.12.0 and 1.12.1 Istio is vulnerable to a privilege escalation attack. Users who have `CREATE` permission for `gateways.gateway.networking.k8s.io` objects can escalate this privilege to create other resources that they may not have access to, such as `Pod`. This vulnerability impacts only an Alpha level feature, the Kubernetes Gateway API. This is not the same as the Istio Gateway type (gateways.networking.istio.io), which is not vulnerable. Users are advised to upgrade to resolve this issue. Users unable to upgrade should implement any of the following which will prevent this vulnerability: Remove the gateways.gateway.networking.k8s.io CustomResourceDefinition, set PILOT_ENABLE_GATEWAY_API_DEPLOYMENT_CONTROLLER=true environment variable in Istiod, or remove CREATE permissions for gateways.gateway.networking.k8s.io objects from untrusted users.
Severity
5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-23 14:11 UTC
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
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CVE-2022-21679 (GCVE-0-2022-21679)
Vulnerability from cvelistv5 – Published: 2022-01-19 21:35 – Updated: 2025-04-23 19:10
VLAI
EPSS
VEX
Title
Authorization Policy bypass in Istio
Summary
Istio is an open platform to connect, manage, and secure microservices. In Istio 1.12.0 and 1.12.1 The authorization policy with hosts and notHosts might be accidentally bypassed for ALLOW action or rejected unexpectedly for DENY action during the upgrade from 1.11 to 1.12.0/1.12.1. Istio 1.12 supports the hosts and notHosts fields in authorization policy with a new Envoy API shipped with the 1.12 data plane. A bug in the 1.12.0 and 1.12.1 incorrectly uses the new Envoy API with the 1.11 data plane. This will cause the hosts and notHosts fields to be always matched regardless of the actual value of the host header when mixing 1.12.0/1.12.1 control plane and 1.11 data plane. Users are advised to upgrade or to not mix the 1.12.0/1.12.1 control plane with 1.11 data plane if using hosts or notHosts field in authorization policy.
Severity
6.8 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-23 15:56 UTC
CWE
- CWE-670 - Always-Incorrect Control Flow Implementation
Assigner
References
2 references
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|---|---|
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CVE-2021-39156 (GCVE-0-2021-39156)
Vulnerability from cvelistv5 – Published: 2021-08-24 22:30 – Updated: 2024-08-04 01:58
VLAI
EPSS
VEX
Title
Fragments in Path May Lead to Authorization Policy Bypass
Summary
Istio is an open source platform for providing a uniform way to integrate microservices, manage traffic flow across microservices, enforce policies and aggregate telemetry data. Istio 1.11.0, 1.10.3 and below, and 1.9.7 and below contain a remotely exploitable vulnerability where an HTTP request with `#fragment` in the path may bypass Istio’s URI path based authorization policies. Patches are available in Istio 1.11.1, Istio 1.10.4 and Istio 1.9.8. As a work around a Lua filter may be written to normalize the path.
Severity
8.1 (High)
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/istio/istio/security/advisorie… | x_refsource_CONFIRM |
| https://istio.io/latest/news/security/istio-secur… | x_refsource_MISC |
Impacted products
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CVE-2021-39155 (GCVE-0-2021-39155)
Vulnerability from cvelistv5 – Published: 2021-08-24 22:25 – Updated: 2024-08-04 01:58
VLAI
EPSS
VEX
Title
Authorization Policy Bypass Due to Case Insensitive Host Comparison
Summary
Istio is an open source platform for providing a uniform way to integrate microservices, manage traffic flow across microservices, enforce policies and aggregate telemetry data. According to [RFC 4343](https://datatracker.ietf.org/doc/html/rfc4343), Istio authorization policy should compare the hostname in the HTTP Host header in a case insensitive way, but currently the comparison is case sensitive. The proxy will route the request hostname in a case-insensitive way which means the authorization policy could be bypassed. As an example, the user may have an authorization policy that rejects request with hostname "httpbin.foo" for some source IPs, but the attacker can bypass this by sending the request with hostname "Httpbin.Foo". Patches are available in Istio 1.11.1, Istio 1.10.4 and Istio 1.9.8. As a work around a Lua filter may be written to normalize Host header before the authorization check. This is similar to the Path normalization presented in the [Security Best Practices](https://istio.io/latest/docs/ops/best-practices/security/#case-normalization) guide.
Severity
8.3 (High)
CWE
- CWE-178 - Improper Handling of Case Sensitivity
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/istio/istio/security/advisorie… | x_refsource_CONFIRM |
| https://datatracker.ietf.org/doc/html/rfc4343 | x_refsource_MISC |
Impacted products
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CVE-2021-34824 (GCVE-0-2021-34824)
Vulnerability from cvelistv5 – Published: 2021-06-29 13:30 – Updated: 2024-08-04 00:26
VLAI
EPSS
VEX
Summary
Istio (1.8.x, 1.9.0-1.9.5 and 1.10.0-1.10.1) contains a remotely exploitable vulnerability where credentials specified in the Gateway and DestinationRule credentialName field can be accessed from different namespaces.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
2 references
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|---|---|
| https://github.com/istio/istio/releases | x_refsource_MISC |
| https://istio.io/latest/news/security/istio-secur… | x_refsource_MISC |
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