CVE-2026-101914
mediumpriority · track · 0OT risk · elevatedEPSS 0.003 · 16 %ileUSEPSS · scored 2026-10-27
@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.
cvss
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ssvc
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weaknesses
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affected products (2)
Products and version ranges known to be affected.
advisories (1)
Vendor and ecosystem advisories describing this.
- GHSA-88h9-xgvx-hvf2@grpc/grpc-js: The exact path match matcher incorrectly only applies a prefix match for case-insensitive matches2026-09-28ghsa · osvUS
### Impact When using RBAC to apply authentication rules, the exact path (method name) matcher applies a prefix match instead of an exact match for case-insensitive matches. As a result, if a service has a method with a name that is a prefix of the name of a different method, and they have different access rules, and case-insensitive matching is used, this bug can cause improper authentication. ### Patches This vulnerability is fixed in 1.13.1 and 1.14.1. ### Workarounds This problem can be avoided by enabling case-sensitive path matching.
sources
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references (6) nvd
External citations — patches, advisories, analysis.
- https://github.com/grpc/grpc-node/commit/6cf64b596da03f1942a6b168998f0670217a99c4
- https://github.com/grpc/grpc-node/commit/a6c5b31180cc8cea94d0a5ea215ce31a49e0409f
- https://github.com/grpc/grpc-node/commit/f32f3712e44581d8dfc8359bd8d30096662f4c75
- https://github.com/grpc/grpc-node/releases/tag/@grpc/grpc-js-xds%401.13.1
- https://github.com/grpc/grpc-node/releases/tag/@grpc/grpc-js-xds%401.14.1
- https://github.com/grpc/grpc-node/security/advisories/GHSA-88h9-xgvx-hvf2
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