CVE-2026-126367
What it is
@grpc/grpc-js implements the core functionality of gRPC purely in JavaScript, without a C++ addon. Before 1.13.2, and from 1.14.0 through 1.14.1, the @grpc/grpc-js-xds SafeRegexValueMatcher and PathSafeRegexValueMatcher add start and end anchors without grouping a supplied top-level alternation. An expression intended to match one of several complete values can therefore match a prefix, substring, or suffix. The affected matchers are used for route selection, xDS credential identity matching, and RBAC URL path, principal name, server name, and header rules. An ALLOW policy using an alternation can consequently accept a method, certificate identity, or header value outside the intended set, while a DENY policy becomes broader rather than permissive. This issue is fixed in versions 1.13.2 and 1.14.2.
At a glance
- Exploitability
- Can be exploited over the network without logging in. Limited direct impact.
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- ReservedThe CVE id was reserved by its CNA
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: not scored yet.
- Severity: 4.8 MEDIUM (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Weakness
- CWE-625
- Record status
- Received
Attack profile CVSS 3.1 · 4.8
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
Raw vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2026-126367.md and follow it. Check whether this project is affected by CVE-2026-126367. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- https://github.com/grpc/grpc-node/commit/3fc3b0ebf7a89d64843a73679951142d33b40cb1
- https://github.com/grpc/grpc-node/commit/57a67e96babcb29b6eabc1833221ccf2fa152d43
- https://github.com/grpc/grpc-node/releases/tag/@grpc/[email protected]
- https://github.com/grpc/grpc-node/releases/tag/@grpc/[email protected]
- https://github.com/grpc/grpc-node/security/advisories/GHSA-r7hq-q2xm-6c5m
References
- https://github.com/grpc/grpc-node/commit/3fc3b0ebf7a89d64843a73679951142d33b40cb1
- https://github.com/grpc/grpc-node/commit/57a67e96babcb29b6eabc1833221ccf2fa152d43
- https://github.com/grpc/grpc-node/releases/tag/@grpc/[email protected]
- https://github.com/grpc/grpc-node/releases/tag/@grpc/[email protected]
- https://github.com/grpc/grpc-node/security/advisories/GHSA-r7hq-q2xm-6c5m