Common Weakness Enumeration

CWE-295

Allowed

Improper Certificate Validation

Abstraction: Base · Status: Draft

The product does not validate, or incorrectly validates, a certificate.

2221 vulnerabilities reference this CWE, most recent first.

CVE-2026-83964 (GCVE-0-2026-83964)

Vulnerability from cvelistv5 – Published: 2026-09-22 18:54 – Updated: 2026-09-26 22:51
VLAI
Title
Adobe Connect | Improper Certificate Validation (CWE-295)
Summary
Adobe Connect is affected by an Improper Certificate Validation vulnerability that could lead to disclosure of sensitive memory. An attacker could leverage this vulnerability to disclose sensitive information. Exploitation of this issue does not require user interaction.
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-26 22:38 UTC
CWE
  • CWE-295 - Improper Certificate Validation (CWE-295)
References
Impacted products
Vendor Product Version
Adobe Adobe Connect Affected: 0 , ≤ 12.11 (semver)
Unaffected: 12.11.1, 12.12 (semver)
Create a notification for this product.
Adobe Adobe Connect Android Mobile App Affected: 0 , ≤ 4.4 (semver)
Unaffected: 4.5 (semver)
Create a notification for this product.
Date Public
2026-09-22 17:00
Show details on NVD website

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CVE-2026-82955 (GCVE-0-2026-82955)

Vulnerability from cvelistv5 – Published: 2026-09-02 14:43 – Updated: 2026-09-02 15:58
VLAI
Summary
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SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-02 15:43 UTC
CWE
  • CWE-295 - Improper certificate validation
  • CWE-347 - Improper verification of cryptographic signature
Impacted products
Vendor Product Version
Eclipse Foundation Eclipse aeriOS Affected: 371ea2101e42aa6503161ce08bbe986e319a9c2f , < e680c69c34b82db4944517198330cc447a1e8f98 (git)
Create a notification for this product.
Show details on NVD website

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CVE-2026-82662 (GCVE-0-2026-82662)

Vulnerability from cvelistv5 – Published: 2026-08-31 08:46 – Updated: 2026-09-01 15:00
VLAI
Title
Nodemailer before 8.0.8 TLS Certificate Validation Bypass
Summary
Nodemailer before 8.0.8 disables TLS certificate verification in lib/fetch/index.js through rejectUnauthorized: false, allowing attackers to intercept OAuth2 token requests. Attackers in a machine-in-the-middle position can capture OAuth client secrets, refresh tokens, and access tokens transmitted over compromised HTTPS connections.
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-01 14:59 UTC
CWE
  • CWE-295 - Improper Certificate Validation
References
Impacted products
Vendor Product Version
nodemailer nodemailer Affected: 0 , < 8.0.8 (semver)
Unaffected: 8.0.8 (semver)
    cpe:2.3:a:nodemailer:nodemailer:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-05-26 00:00
Show details on NVD website

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CVE-2026-82208 (GCVE-0-2026-82208)

Vulnerability from cvelistv5 – Published: 2026-09-06 17:49 – Updated: 2026-09-15 06:03
VLAI
Title
wolfSSL CA-cache hit overrides callback
Summary
With the wolfSSL backend, when CA caching is enabled and an `CURLOPT_SSL_CTX_FUNCTION` callback replaces the trust store, libcurl can silently reinstall the cached store after the callback returns. A certificate trusted by the cached store but rejected by the callback-selected store is then incorrectly accepted.
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-08 18:46 UTC
CWE
  • CWE-295 - Improper Certificate Validation
Impacted products
Vendor Product Version
curl curl Affected: 8.9.1 , < 8.14.2 (semver)
Affected: 8.15.0 , < 8.16.1 (semver)
Affected: 8.17.0 , < 8.20.1 (semver)
Affected: 8.21.0 , < 8.22.0 (semver)
Create a notification for this product.
curl curl Affected: 0f2876b2c33f6784a27b6f7345bd8cd95b46352a , < ed0338befd1d865a8ea1fbaa90013a096dedd07a (git)
Create a notification for this product.
curl curl Affected: 8.21.0
Affected: 8.20.0
Affected: 8.19.0
Affected: 8.18.0
Affected: 8.17.0
Affected: 8.16.0
Affected: 8.15.0
Affected: 8.14.1
Affected: 8.14.0
Affected: 8.13.0
Affected: 8.12.1
Affected: 8.12.0
Affected: 8.11.1
Affected: 8.11.0
Affected: 8.10.1
Affected: 8.10.0
Affected: 8.9.1
Create a notification for this product.
Show details on NVD website

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CVE-2026-82180 (GCVE-0-2026-82180)

Vulnerability from cvelistv5 – Published: 2026-09-03 13:20 – Updated: 2026-09-03 13:31
VLAI
Summary
In Eclipse Arrowhead versions from 5.0.0 to 5.2.1 when the MQTT API is enabled with the certificate authentication policy, CertificateMqttFilter parses an X.509 certificate that the client sends inside the MQTT message payload (the authentication field of MqttRequestTemplate) and treats its Subject DN as the authenticated identity. The certificate is decoded with CertificateFactory.generateCertificate() but its signature is never verified and its issuer chain is never validated against any trust store. Authorisation is reduced to two string comparisons on attacker-supplied data: the DN-qualifier must equal "sy" or "op", and the cloud-name part of the CN must match the server's. Both values are public (the cloud name is in the server's own TLS certificate). An attacker who can publish to the MQTT broker can therefore mint a self-signed certificate with CN=Sysop.<cloud>.<org>.arrowhead.eu, dnQualifier=op, send it as the authentication field, and be authenticated as the cloud's system operator with isSysOp == true. This passes the downstream ManagementServiceMqttFilter (request.isSysOp() → allowed) and gives full management access over MQTT. The HTTP CertificateFilter is not affected — it reads the certificate from jakarta.servlet.request.X509Certificate, which Tomcat populates only after a successful mTLS handshake against the configured trust store.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-03 13:31 UTC
CWE
  • CWE-295 - Improper certificate validation
  • CWE-290 - Authentication bypass by spoofing
Impacted products
Vendor Product Version
Eclipse Foundation Eclipse Arrowhead Affected: 5.0.0 , ≤ 5.2.1 (semver)
Create a notification for this product.
Show details on NVD website

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CVE-2026-82157 (GCVE-0-2026-82157)

Vulnerability from cvelistv5 – Published: 2026-09-24 18:39 – Updated: 2026-09-25 03:55
VLAI
Summary
Dell ThinOS 10, versions prior to SecurityAddon_2605.10.2766_T10, contains an Improper Certificate Validation vulnerability. An unauthenticated attacker with adjacent network access could potentially exploit this vulnerability, leading to Protection mechanism bypass and Unauthorized access.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-24 00:00 UTC
CWE
  • CWE-295 - Improper Certificate Validation
References
Impacted products
Vendor Product Version
Dell ThinOS 10 Affected: 0 , < SecurityAddon_2605.10.2766_T10 (semver)
Create a notification for this product.
Date Public
2026-09-23 18:37
Show details on NVD website

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CVE-2026-81871 (GCVE-0-2026-81871)

Vulnerability from cvelistv5 – Published: 2026-09-16 20:43 – Updated: 2026-09-17 19:24
VLAI
Title
OpenTelemetry-Go: Log gRPC exporter ignores env TLS certs, bypassing mTLS/pinning
Summary
OpenTelemetry-Go is the Go implementation of OpenTelemetry. Prior to version 0.21.0, the exporters/otlp/otlplog/otlploggrpc package loads OTEL_EXPORTER_OTLP_LOGS_CERTIFICATE, OTEL_EXPORTER_OTLP_CERTIFICATE, and related client certificate environment variables through loadEnvTLS into cfg.tlsCfg, but newGRPCDialOptions does not apply cfg.tlsCfg when creating gRPC transport credentials. The environment-only TLS path instead uses credentials.NewTLS with system roots and no configured client certificate, bypassing intended private CA pinning and mutual TLS unless the application also supplies WithTLSCredentials. A network attacker able to intercept or spoof the collector connection with a system-trusted certificate can read or alter log telemetry. This issue is fixed in version 0.21.0.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-17 17:10 UTC
CWE
  • CWE-295 - Improper Certificate Validation
  • CWE-923 - Improper Restriction of Communication Channel to Intended Endpoints
Impacted products
Show details on NVD website

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CVE-2026-81868 (GCVE-0-2026-81868)

Vulnerability from cvelistv5 – Published: 2026-09-17 15:36 – Updated: 2026-09-23 18:46
VLAI
Title
Steeltoe: Header-forwarded client cert lacks proof of private-key possession
Summary
Steeltoe is an open source project that provides a collection of libraries that helps users build cloud-native applications. Prior to 4.3.0, Steeltoe.Security.Authorization.Certificate deployments using AddOrgAndSpacePolicies() and UseCertificateAuthorization() trust the public certificate supplied in the X-Client-Cert request header without proving possession of the corresponding private key. Common Cloud Foundry routers do not remove this header from inbound requests. When inbound requests are not restricted to a known trusted proxy source IP, an attacker who obtains the public certificate of an application instance in the target organization or space and can reach the application can spoof X-Client-Cert to bypass the SameOrg and SameSpace policies for the certificate validity period. This issue is fixed in version 4.3.0.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-23 18:32 UTC
CWE
  • CWE-288 - Authentication Bypass Using an Alternate Path or Channel
  • CWE-295 - Improper Certificate Validation
Impacted products
Show details on NVD website

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CVE-2026-81518 (GCVE-0-2026-81518)

Vulnerability from cvelistv5 – Published: 2026-08-28 20:18 – Updated: 2026-08-31 18:38
VLAI
Title
BI Connector Optional Client Certificate Verification Allows Unauthenticated Connections
Summary
When mongosqld is configured with a client certificate authority file, the listener requests a client certificate during the TLS handshake but does not require one, so a client that presents no certificate is still accepted. In deployments that rely on client certificates as the sole means of identifying users, a remote party with network access to the listener can therefore establish a session and read the MongoDB data exposed through the connector.
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-31 18:37 UTC
CWE
  • CWE-295 - Improper Certificate Validation
Impacted products
Vendor Product Version
MongoDB BI Connector Affected: 0 , < 2.14.31 (semver)
Create a notification for this product.
Show details on NVD website

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CVE-2026-81447 (GCVE-0-2026-81447)

Vulnerability from cvelistv5 – Published: 2026-09-17 14:47 – Updated: 2026-09-18 03:56
VLAI
Summary
Dell OpenManage Server Administrator, versions prior to 11.1.0.3, contains an Improper Certificate Validation vulnerability. An unauthenticated attacker with adjacent network access could potentially exploit this vulnerability, leading to Information disclosure and Information tampering.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-17 00:00 UTC
CWE
  • CWE-295 - Improper Certificate Validation
References
Date Public
2026-09-08 06:30
Show details on NVD website

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Mitigation
Architecture and Design Implementation

Certificates should be carefully managed and checked to assure that data are encrypted with the intended owner's public key.

Mitigation
Implementation

If certificate pinning is being used, ensure that all relevant properties of the certificate are fully validated before the certificate is pinned, including the hostname.

CAPEC-459: Creating a Rogue Certification Authority Certificate

An adversary exploits a weakness resulting from using a hashing algorithm with weak collision resistance to generate certificate signing requests (CSR) that contain collision blocks in their "to be signed" parts. The adversary submits one CSR to be signed by a trusted certificate authority then uses the signed blob to make a second certificate appear signed by said certificate authority. Due to the hash collision, both certificates, though different, hash to the same value and so the signed blob works just as well in the second certificate. The net effect is that the adversary's second X.509 certificate, which the Certification Authority has never seen, is now signed and validated by that Certification Authority.

CAPEC-475: Signature Spoofing by Improper Validation

An adversary exploits a cryptographic weakness in the signature verification algorithm implementation to generate a valid signature without knowing the key.