Auth bypass in Grpc Grpc-Node
CVE-2026-101914
@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.
Published .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Grpc Grpc-Node — versions < 1.13.1, >= 1.14.0, < 1.14.1
Weakness classification (CWE)
References
- github.com/grpc/grpc-node/security/advisories/GHSA-88h9-xgvx-hvf2
- github.com/grpc/grpc-node/commit/6cf64b596da03f1942a6b168998f0670217a99c4
- github.com/grpc/grpc-node/commit/a6c5b31180cc8cea94d0a5ea215ce31a49e0409f
- github.com/grpc/grpc-node/commit/f32f3712e44581d8dfc8359bd8d30096662f4c75
- github.com/grpc/grpc-node/releases/tag/@grpc/grpc-js-xds@1.13.1
- github.com/grpc/grpc-node/releases/tag/@grpc/grpc-js-xds@1.14.1
Frequently asked questions
- What is CVE-2026-101914?
- CVE-2026-101914 is a medium-severity vulnerability in Grpc Grpc-Node, classified under Partial String Comparison. CVSS score: 6.5/10. Published 2026-09-28.
- How severe is CVE-2026-101914?
- Medium severity. CVSS v3 base score is 6.5 out of 10.