A flaw was found in grpc-js. In configurations where client certificates are optional, the authentication context lookup fails to distinguish between authorized and unauthorized peer certificates. A remote attacker can exploit this vulnerability by presenting an untrusted certificate, allowing them to bypass authentication mechanisms and access protected services.
Last checked: 2026-10-01 15:34 UTC
No exploitation evidence · CISA Coordinator (Assessed 2026-10-01 14:54 UTC)
Fix evidence last checked: 2026-09-29 05:42 UTC