@grpc/grpc-js: The exact path match matcher incorrectly only applies a prefix match for case-insensitive matches

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-101914
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-28 20:17:09 UTC
Updated2026-09-28 20:17:09 UTC
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.

Risk And Classification

Primary CVSS: v3.1 6.5 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N

Problem Types: CWE-187 | CWE-863 | CWE-187 CWE-187: Partial String Comparison | CWE-863 CWE-863: Incorrect Authorization

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary6.5MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N
3.1CNADECLARED6.5MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
High
Availability
None

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Grpc Grpc-node affected < 1.13.1 Not specified
CNA Grpc Grpc-node affected >= 1.14.0, < 1.14.1 Not specified

References

ReferenceSourceLinkTags
github.com/grpc/grpc-node/commit/a6c5b31180cc8cea94d0a5ea215ce31a49e0409f [email protected] github.com
github.com/grpc/grpc-node/commit/6cf64b596da03f1942a6b168998f0670217a99c4 [email protected] github.com
github.com/grpc/grpc-node/releases/tag/@grpc/grpc-js-xds%401.14.1 [email protected] github.com
github.com/grpc/grpc-node/releases/tag/@grpc/grpc-js-xds%401.13.1 [email protected] github.com
github.com/grpc/grpc-node/commit/f32f3712e44581d8dfc8359bd8d30096662f4c75 [email protected] github.com
github.com/grpc/grpc-node/security/advisories/GHSA-88h9-xgvx-hvf2 [email protected] github.com
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