High severity · published Sep 28, 2026
CVE-2026-101916
@grpc/grpc-js: In certain configurations, getAuthContext can return unauthorized certificates as though they were authorized
7.4
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 12% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GR
grpc-node · grpc
< 1.13.6; >= 1.14.0, < 1.14.5 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-101916
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-101916
x_refsource_CONFIRM
https://github.com/grpc/grpc-node/security/advisories/GHSA-m9gg-hp2v-232j
x_refsource_MISC
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
More from grpc-node
7.5
CVE-2026-48069
@grpc/grps-js: An incoming malformed compressed message can cause a client or server crash
7.5
CVE-2026-48068
@grpc/grps-js: A malformed request can cause a server crash
6.5
CVE-2026-101914
@grpc/grpc-js: The exact path match matcher incorrectly only applies a prefix match for case-insensitive matches
3.7
CVE-2026-101915
@grpc/grpc-js: The server transmits some error messages thrown by method handlers to the client in status messages