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.
References6
- github.com/grpc/grpc-node/commit/6cf64b596da03f1942a6b168998f06…
- github.com/grpc/grpc-node/commit/a6c5b31180cc8cea94d0a5ea215ce3…
- github.com/grpc/grpc-node/commit/f32f3712e44581d8dfc8359bd8d300…
- github.com/grpc/grpc-node/releases/tag/@grpc/grpc-js-xds%401.13…
- github.com/grpc/grpc-node/releases/tag/@grpc/grpc-js-xds%401.14…
- github.com/grpc/grpc-node/security/advisories/GHSA-88h9-xgvx-hv…
Metrics
- CVSS 3.1
-
6.5
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N - EPSS — exploit probability
- 0% percentile: 17 · as of 9 November 2026
- CWE
- CWE-187CWE-863
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.