{"action":"Upgrade google.golang.org/grpc to 1.83.1 or later.","affected":[{"fixed":"1.83.1","introduced":"0"}],"component":"google.golang.org/grpc","cve_ids":["CVE-2026-84303"],"ecosystem":"Go","epss":0.00311,"exploited":false,"fixed_versions":["1.83.1"],"ghsa_id":"GHSA-qc2q-p7wx-3px3","id":"tcs_01M5KFJVA83KPBC0PW295RZ3KD","modified_at":"2026-09-15T19:10:32.558419529Z","published_at":"2026-09-08T20:50:21Z","references":["https://osv.dev/vulnerability/GHSA-qc2q-p7wx-3px3","https://github.com/grpc/grpc-go/security/advisories/GHSA-qc2q-p7wx-3px3","https://nvd.nist.gov/vuln/detail/CVE-2026-84303","https://github.com/grpc/grpc-go/pull/9332","https://github.com/grpc/grpc-go/pull/9335","https://github.com/grpc/grpc-go/commit/db9482836c298f234c896cf82ab68cafc78237f8","https://github.com/grpc/grpc-go/commit/ebba6f3f1b206e2b4dc4d1d5a96d18430302c2fe","https://github.com/grpc/grpc-go","https://github.com/grpc/grpc-go/releases/tag/v1.83.1"],"severity":{"label":"medium"},"sources":[{"source":"osv","source_id":"GHSA-qc2q-p7wx-3px3","url":"https://osv.dev/vulnerability/GHSA-qc2q-p7wx-3px3"}],"summary":"gRPC-Go: xDS RBAC HTTP Filter bypass via mixed-case Header Matching and gRFC A41 validation evasion"}