Vulnerability · Published Sep 28, 2026 · Assigned by GitHub_M
CVE-2026-101914@grpc/grpc-js: The exact path match matcher incorrectly only applies a prefix match for case-insensitive matches
Medium 6.5
In plain English
A medium-severity incorrect authorization in grpc-node from grpc. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 17% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
@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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | @grpc/grpc-js-xds | 1.13.1 | GHSA-88h9-xgvx-hvf2 |
| npm | @grpc/grpc-js-xds | 1.14.1 | GHSA-88h9-xgvx-hvf2 |
Affected products (as reported)
Weakness: CWE-187, CWE-863 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N
References
- https://github.com/grpc/grpc-node/security/advisories/GHSA-88h9-xgvx-hvf2 x_refsource_CONFIRM
- https://github.com/grpc/grpc-node/commit/6cf64b596da03f1942a6b168998f0670217a99c4 x_refsource_MISC
- https://github.com/grpc/grpc-node/commit/a6c5b31180cc8cea94d0a5ea215ce31a49e0409f x_refsource_MISC
- https://github.com/grpc/grpc-node/commit/f32f3712e44581d8dfc8359bd8d30096662f4c75 x_refsource_MISC
- https://github.com/grpc/grpc-node/releases/tag/@grpc/grpc-js-xds%401.13.1 x_refsource_MISC
- https://github.com/grpc/grpc-node/releases/tag/@grpc/grpc-js-xds%401.14.1 x_refsource_MISC