Common Weakness Enumeration
CWE-187
AllowedPartial String Comparison
Abstraction: Variant · Status: Incomplete
The product performs a comparison that only examines a portion of a factor before determining whether there is a match, such as a substring, leading to resultant weaknesses.
32 vulnerabilities reference this CWE, most recent first.
CVE-2026-101914 (GCVE-0-2026-101914)
Vulnerability from cvelistv5 – Published: 2026-09-28 19:36 – Updated: 2026-09-29 19:21
VLAI
EPSS
VEX
Title
@grpc/grpc-js: The exact path match matcher incorrectly only applies a prefix match for case-insensitive matches
Summary
@grpc/grpc-js implements the core functionality of gRPC purely in JavaScript, without a C++ addon. Prior to 1.13.1 and 1.14.1, the exact path (method name) matcher used by RBAC performs a prefix comparison instead of an equality comparison when case-insensitive matching is enabled. If one service method name prefixes another and the methods have different access rules, a request for the longer method can match the shorter method's rule and cause incorrect authorization. This issue is fixed in versions 1.13.1 and 1.14.1.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-29 19:21 UTC
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://github.com/grpc/grpc-node/security/adviso… | x_refsource_CONFIRM |
| https://github.com/grpc/grpc-node/commit/6cf64b59… | x_refsource_MISC |
| https://github.com/grpc/grpc-node/commit/a6c5b311… | x_refsource_MISC |
| https://github.com/grpc/grpc-node/commit/f32f3712… | x_refsource_MISC |
| https://github.com/grpc/grpc-node/releases/tag/@g… | x_refsource_MISC |
| https://github.com/grpc/grpc-node/releases/tag/@g… | x_refsource_MISC |
Impacted products
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CVE-2026-87853 (GCVE-0-2026-87853)
Vulnerability from cvelistv5 – Published: 2026-09-09 16:06 – Updated: 2026-09-10 14:56
VLAI
EPSS
VEX
Title
Sssd: sssd: idp authentication prefix comparison allows cross-user impersonation
Summary
A flaw was found in SSSD's IdP authentication provider. The eval_access_token_buf() function compares the OIDC subject identifier using strncmp() with the authenticated user's identifier length, performing a prefix comparison instead of an exact match. An attacker whose IdP identifier is a strict prefix of a target user's identifier can authenticate as the target user.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-09 18:28 UTC
CWE
- CWE-187 - Partial String Comparison
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://access.redhat.com/security/cve/CVE-2026-87853 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2530888 | issue-trackingx_refsource_REDHAT |
Impacted products
6 products
| Vendor | Product | Version | |
|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 |
cpe:/o:redhat:enterprise_linux:10
|
|
| Red Hat | Red Hat Enterprise Linux 6 |
cpe:/o:redhat:enterprise_linux:6
|
|
| Red Hat | Red Hat Enterprise Linux 7 |
cpe:/o:redhat:enterprise_linux:7
|
|
| Red Hat | Red Hat Enterprise Linux 8 |
cpe:/o:redhat:enterprise_linux:8
|
|
| Red Hat | Red Hat Enterprise Linux 9 |
cpe:/o:redhat:enterprise_linux:9
|
|
| Red Hat | Red Hat OpenShift Container Platform 4 |
cpe:/a:redhat:openshift:4
|
Date Public
2026-09-09 14:15
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CVE-2026-84376 (GCVE-0-2026-84376)
Vulnerability from cvelistv5 – Published: 2026-09-02 16:24 – Updated: 2026-09-04 02:44
VLAI
EPSS
VEX
Title
Astro: Authorization bypass from missing path-segment boundary check when stripping the configured base
Summary
Astro is a web framework for content-driven websites. Prior to 7.2.4, Astro stripped a configured non-root base path from request pathnames using a string-prefix check without verifying a path-segment boundary. With base "/app", a request to "/appX/admin" resolved internally to the protected "/admin" route while middleware observed "/appX/admin" in context.url.pathname. In applications that authorize base-prefixed routes by inspecting context.url.pathname, an unauthenticated remote attacker could bypass pathname-based middleware authorization and reach protected routes. This issue is fixed in version 7.2.4.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-04 02:44 UTC
CWE
- CWE-187 - Partial String Comparison
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/withastro/astro/security/advis… | x_refsource_CONFIRM |
| https://github.com/withastro/astro/pull/17701 | x_refsource_MISC |
| https://github.com/withastro/astro/commit/05763a0… | x_refsource_MISC |
| https://github.com/withastro/astro/releases/tag/a… | x_refsource_MISC |
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CVE-2026-81479 (GCVE-0-2026-81479)
Vulnerability from cvelistv5 – Published: 2026-09-17 11:28 – Updated: 2026-09-17 12:03
VLAI
EPSS
VEX
Summary
Dell OpenManage Server Administrator, versions prior to 11.1.0.3, contains a Partial String Comparison vulnerability. A low privileged attacker with local access could potentially exploit this vulnerability, leading to Denial of service.
Severity
5.8 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-17 12:02 UTC
CWE
- CWE-187 - Partial String Comparison
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.dell.com/support/kbdoc/en-us/00050658… | vendor-advisory |
Impacted products
5 products
| Vendor | Product | Version | |
|---|---|---|---|
| Dell | OpenManage Server Administrator Managed Node (Patch) for Windows |
Affected:
0 , < 11.1.0.3
(semver)
|
|
| Dell | OpenManage Server Administrator Managed Node for RHEL 8.10 |
Affected:
0 , < 11.1.0.3
(semver)
|
|
| Dell | OpenManage Server Administrator Managed Node for RHEL 9.4 |
Affected:
0 , < 11.1.0.3
(semver)
|
|
| Dell | OpenManage Server Administrator Managed Node for SLES 15 |
Affected:
0 , < 11.1.0.3
(semver)
|
|
| Dell | OpenManage Server Administrator Managed Node for Ubuntu 22.04 |
Affected:
0 , < 11.1.0.3
(semver)
|
Date Public
2026-09-08 06:30
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CVE-2026-62750 (GCVE-0-2026-62750)
Vulnerability from cvelistv5 – Published: 2026-08-11 17:04 – Updated: 2026-09-29 20:19
VLAI
EPSS
VEX
Title
Windows HTTP Protocol Stack Tampering Vulnerability
Summary
Partial string comparison in Windows HTTP Protocol Stack allows an unauthorized attacker to perform tampering over an adjacent network.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-12 13:48 UTC
CWE
- CWE-187 - Partial String Comparison
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
Impacted products
20 products
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Windows 10 Version 1607 |
Affected:
10.0.14393.0 , < 10.0.14393.9418
(custom)
|
|
| Microsoft | Windows 10 Version 1809 |
Affected:
10.0.17763.0 , < 10.0.17763.9121
(custom)
|
|
| Microsoft | Windows 10 Version 21H2 |
Affected:
10.0.19044.0 , < 10.0.19044.7663
(custom)
|
|
| Microsoft | Windows 10 Version 22H2 |
Affected:
10.0.19045.0 , < 10.0.19045.7663
(custom)
|
|
| Microsoft | Windows 11 version 23H2 |
Affected:
10.0.22631.0 , < 10.0.22631.7517
(custom)
|
|
| Microsoft | Windows 11 Version 23H2 |
Affected:
10.0.22631.0 , < 10.0.22631.7517
(custom)
|
|
| Microsoft | Windows 11 Version 24H2 |
Affected:
10.0.26100.0 , < 10.0.26100.9168
(custom)
|
|
| Microsoft | Windows 11 Version 25H2 |
Affected:
10.0.26200.0 , < 10.0.26200.9168
(custom)
|
|
| Microsoft | Windows 11 version 26H1 |
Affected:
10.0.28000.0 , < 10.0.28000.2704
(custom)
|
|
| Microsoft | Windows Server 2012 |
Affected:
6.2.9200.0 , < 6.2.9200.26280
(custom)
|
|
| Microsoft | Windows Server 2012 (Server Core installation) |
Affected:
6.2.9200.0 , < 6.2.9200.26280
(custom)
|
|
| Microsoft | Windows Server 2012 R2 |
Affected:
6.3.9600.0 , < 6.3.9600.23338
(custom)
|
|
| Microsoft | Windows Server 2012 R2 (Server Core installation) |
Affected:
6.3.9600.0 , < 6.3.9600.23338
(custom)
|
|
| Microsoft | Windows Server 2016 |
Affected:
10.0.14393.0 , < 10.0.14393.9418
(custom)
|
|
| Microsoft | Windows Server 2016 (Server Core installation) |
Affected:
10.0.14393.0 , < 10.0.14393.9418
(custom)
|
|
| Microsoft | Windows Server 2019 |
Affected:
10.0.17763.0 , < 10.0.17763.9121
(custom)
|
|
| Microsoft | Windows Server 2019 (Server Core installation) |
Affected:
10.0.17763.0 , < 10.0.17763.9121
(custom)
|
|
| Microsoft | Windows Server 2022 |
Affected:
10.0.20348.0 , < 10.0.20348.5499
(custom)
|
|
| Microsoft | Windows Server 2025 |
Affected:
10.0.26100.0 , < 10.0.26100.33296
(custom)
|
|
| Microsoft | Windows Server 2025 (Server Core installation) |
Affected:
10.0.26100.0 , < 10.0.26100.33296
(custom)
|
Date Public
2026-08-11 14:00
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"product": "Windows Server 2016",
"vendor": "Microsoft",
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CVE-2026-55602 (GCVE-0-2026-55602)
Vulnerability from cvelistv5 – Published: 2026-06-22 15:58 – Updated: 2026-06-23 14:18
VLAI
EPSS
VEX
Title
http-proxy-middleware `router` host+path substring matching allows Host-header-driven backend routing bypass
Summary
http-proxy-middleware is node.js http-proxy middleware. From 0.16.0 until 2.0.10, 3.0.6, and 4.1.0, http-proxy-middleware documents router proxy-table entries as host, path, or host+path selectors, but the host+path implementation uses unanchored substring matching on attacker-controlled request metadata. As a result, a crafted Host header that is only a superstring match for a configured host+path key can still route a request to an unintended backend. This vulnerability is fixed in 2.0.10, 3.0.6, and 4.1.0.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-23 14:17 UTC
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/chimurai/http-proxy-middleware… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| chimurai | http-proxy-middleware |
Affected:
>= 4.0.0, < 4.1.0
Affected: >= 3.0.0, < 3.0.6 Affected: >= 0.16.0, < 2.0.10 |
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CVE-2026-45692 (GCVE-0-2026-45692)
Vulnerability from cvelistv5 – Published: 2026-06-23 17:55 – Updated: 2026-06-26 18:16
VLAI
EPSS
VEX
Title
Caddy: Remote Admin Authorization Bypass in `/config` API via Array Index Normalization
Summary
Caddy is an extensible server platform that uses TLS by default. From 2.4.0 until 2.11.3, the authorization layer and the /config traversal layer do not agree on what object the path refers to. In this case, a path authorized for one config object is accepted, but then resolves to a different config object during traversal. This happens because the authorization layer uses string prefix matching and the /config traversal layer parses array indices numerically using strconv.Atoi(). This vulnerability is fixed in 2.11.3.
Severity
5.4 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-26 18:16 UTC
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/caddyserver/caddy/security/adv… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| caddyserver | caddy |
Affected:
>= 2.4.0, < 2.11.3
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CVE-2026-44837 (GCVE-0-2026-44837)
Vulnerability from cvelistv5 – Published: 2026-05-26 19:40 – Updated: 2026-05-28 14:04
VLAI
EPSS
VEX
Title
view_component: System Test Entry Point Path Check Allows Sibling Directory Escape
Summary
view_component is a framework for building reusable, testable, and encapsulated view components in Ruby on Rails. From 3.0.0 to 4.9.0, the system test entrypoint canonicalizes a user-controlled file path with File.realpath, then checks whether the resolved path starts with the temp directory path. This is not a safe containment check because sibling directories can share the same string prefix. This vulnerability is fixed in 4.9.0.
Severity
5.9 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-28 14:03 UTC
CWE
- CWE-187 - Partial String Comparison
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/ViewComponent/view_component/s… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| ViewComponent | view_component |
Affected:
>= 3.0.0, < 4.9.0
|
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CVE-2026-35031 (GCVE-0-2026-35031)
Vulnerability from cvelistv5 – Published: 2026-04-14 22:18 – Updated: 2026-04-16 13:56
VLAI
EPSS
VEX
Title
Jellyfin: Potential RCE via subtitle upload path traversal + .strm chain
Summary
Jellyfin is an open source self hosted media server. Versions prior to 10.11.7 contain a vulnerability chain in the subtitle upload endpoint (POST /Videos/{itemId}/Subtitles), where the Format field is not validated, allowing path traversal via the file extension and enabling arbitrary file write. This arbitrary file write can be chained into arbitrary file read via .strm files, database extraction, admin privilege escalation, and ultimately remote code execution as root via ld.so.preload. Exploitation requires an administrator account or a user that has been explicitly granted the "Upload Subtitles" permission. This issue has been fixed in version 10.11.7. If users are unable to upgrade immediately, they can grant non-administrator users Subtitle upload permissions to reduce attack surface.
Severity
10 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-16 13:55 UTC
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/jellyfin/jellyfin/security/adv… | x_refsource_CONFIRM |
| https://github.com/jellyfin/jellyfin/releases/tag… | x_refsource_MISC |
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CVE-2026-34785 (GCVE-0-2026-34785)
Vulnerability from cvelistv5 – Published: 2026-04-02 16:44 – Updated: 2026-07-15 01:03
VLAI
EPSS
VEX
Title
Rack: Local file inclusion in `Rack::Static` via URL Prefix Matching
Summary
Rack is a modular Ruby web server interface. Prior to versions 2.2.23, 3.1.21, and 3.2.6, Rack::Static determines whether a request should be served as a static file using a simple string prefix check. When configured with URL prefixes such as "/css", it matches any request path that begins with that string, including unrelated paths such as "/css-config.env" or "/css-backup.sql". As a result, files under the static root whose names merely share the configured prefix may be served unintentionally, leading to information disclosure. This issue has been patched in versions 2.2.23, 3.1.21, and 3.2.6.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-02 18:58 UTC
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/rack/rack/security/advisories/… | x_refsource_CONFIRM |
| https://access.redhat.com/security/cve/CVE-2026-34785 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2454486 | issue-trackingx_refsource_REDHAT |
| https://security.access.redhat.com/data/csaf/v2/v… | x_sadp-csaf-vex |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| rack | rack |
Affected:
< 2.2.23
Affected: >= 3.0.0.beta1, < 3.1.21 Affected: >= 3.2.0, < 3.2.6 |
|
| Red Hat | Red Hat Satellite 6 |
cpe:/a:redhat:satellite:6
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Mitigation
Testing
Thoroughly test the comparison scheme before deploying code into production. Perform positive testing as well as negative testing.
No CAPEC attack patterns related to this CWE.