@grpc/grpc-js: In certain configurations, getAuthContext can return unauthorized certificates as though they were authorized — GHSA-M9GG-HP2V-232J

Summary

### Impact When server credentials are created with the `requireClientCertificate` option set to `false`, `getAuthContext` does not distinguish between authorized and unauthorized certificates in its return value. This can create improper authentication vulnerabilities for `@grpc/grpc-js` users who use the result of `getAuthContext` for authentication. In particular, `@grpc/grpc-js-xds` can both set the…

Timeline

Published by source

2026-09-30

Risk context

• Reported severity or threat level: high.
• Reported CVSS score: 7.4 out of 10.
• Reported EPSS value: 0.00208.
• Review exposure for the affected product or family: npm: @grpc/grpc-js.

Product

npm: @grpc/grpc-js

What to do

General, cautious steps (verify details in the official source):

• Prioritize patching or mitigation immediately (treat as actively risky).
• Identify affected product versions in your inventory and verify whether you are impacted.
• Apply vendor patches/updates or recommended mitigations as soon as available.
• Read the official advisory for exact affected versions and remediation steps.

Official advisory

• Read the official source
• CVE Record
• NVD

Evidence and provenance

Canonical advisory ID

GHSA-M9GG-HP2V-232J

Source

GitHub

Vendor

GitHub

Published by source

2026-09-30

Last source activity

2026-09-30

Additional identifiers

CVE-2026-101916

Curated by

hlukh.ch

Related advisories and connections

These advisories are connected by shared CVE, product, vendor, source, or time signals.