All vulnerabilities
CVE-2026-101916GHSA-m9gg-hp2v-232j

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

grpc @grpc/grpc-jsnpmLibraries & packages
Open in ThreatlineRecord JSON
CVSS
7.4High
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.21%Chance of exploitation activity in the next 30 days, higher than 10% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in1.13.6Also 1.14.5GitHub
Published28 Sep 2026Updated 1 Oct 2026CVE List

What fixes it

  • 1.13.6@grpc/grpc-js, npmGitHubnpm install @grpc/grpc-js@1.13.6
  • 1.14.5@grpc/grpc-js, npmGitHubnpm install @grpc/grpc-js@1.14.5

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Description

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 requireClientCertificate option to false and use the return value of getAuthContext for RBAC authentication in some configurations.

Patches

This vulenrability is fixed in 1.13.6 and 1.14.5.

Workarounds

@grpc/grpc-js users using getAuthContext this way can avoid this problem by setting requireClientCertificate to true. @grpc/grpc-js-xds users using RBAC can avoid this by setting the require_client_certificate field to true in the DownstreamTlsContext in the xDS configuration.

Text from GitHub Advisory Database

Affected versions 6

  • @grpc/grpc-js, npm< 1.13.6GitHub
  • @grpc/grpc-js, npm>= 1.14.0, < 1.14.5GitHub
  • grpc-nodeaffected: < 1.13.6CVE List
  • grpc-nodeaffected: >= 1.14.0, < 1.14.5CVE List
  • @grpc/grpc-js, npmfrom first release, fixed in 1.13.6OSV
  • @grpc/grpc-js, npmfrom 1.14.0, fixed in 1.14.5OSV

References 6