Vulnerability · Published Sep 28, 2026 · Assigned by GitHub_M

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

High 7.4

In plain English

A high-severity improper certificate validation in grpc-node from grpc. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 12% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.4High

Exploit odds (30 days)0.2%top 88.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	@grpc/grpc-js	1.13.6	GHSA-m9gg-hp2v-232j
npm	@grpc/grpc-js	1.14.5	GHSA-m9gg-hp2v-232j

Affected products (as reported)

Vendor	Product	Versions
grpc	grpc-node	< 1.13.6>= 1.14.0, < 1.14.5

Weakness: CWE-295 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

References

https://github.com/grpc/grpc-node/security/advisories/GHSA-m9gg-hp2v-232j x_refsource_CONFIRM
https://github.com/grpc/grpc-node/commit/2a84ec8b01b9db68ed9d2b117a53a81449edb8ee x_refsource_MISC
https://github.com/grpc/grpc-node/commit/b4e0079c6d22a2adedfcac748e0bc083f783bc7c x_refsource_MISC
https://github.com/grpc/grpc-node/releases/tag/@grpc/grpc-js%401.14.5 x_refsource_MISC