{"id":"CVE-2026-71485","summary":"Centrifugo: Client-forgeable headers emulation lets any client spoof headers forwarded to proxy backends","details":"Centrifugo is an open-source scalable real-time messaging server. Prior to 6.9.0, Centrifugo copies the client-controlled protocol.ConnectRequest.headers map through OnClientConnecting in internal/client/handler.go, ConnectEvent.Headers, and SetEmulatedHeadersToContext. The requestHeaders path in internal/proxy/http.go, the requestMetadata path in internal/proxy/grpc.go, and the Consume path in internal/unigrpc/grpc.go can forward an allowlisted value as a trusted backend header or metadata value. A remote client can spoof a header such as x-trusted-user for connect, refresh, subscribe, publish, RPC, and related proxy calls when the backend relies on that header for authentication or authorization. The unidirectional gRPC transport has no transport-level HTTP header that can override the emulated value. This issue is fixed in version 6.9.0.","aliases":["GHSA-9468-v6mj-fppw"],"modified":"2026-09-20T11:30:14.997156118Z","published":"2026-08-20T21:01:00.931Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-290"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71485.json"},"references":[{"type":"WEB","url":"https://github.com/centrifugal/centrifugo/releases/tag/v6.9.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71485.json"},{"type":"ADVISORY","url":"https://github.com/centrifugal/centrifugo/security/advisories/GHSA-9468-v6mj-fppw"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-71485"},{"type":"FIX","url":"https://github.com/centrifugal/centrifugo/commit/84d38cea1dd2efa24375a148817a974c8727f4b0"},{"type":"FIX","url":"https://github.com/centrifugal/centrifugo/pull/1182"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/centrifugal/centrifugo","events":[{"introduced":"0"},{"fixed":"84d38cea1dd2efa24375a148817a974c8727f4b0"},{"fixed":"4015be7784391aa7164756a98eda65d02accf12d"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"6.9.0"}],"source":["AFFECTED_FIELD","REFERENCES"]}}],"versions":["v6.8.4","v6.8.3","v6.8.2","v6.8.1","v6.8.0","v6.7.2","v6.7.1","v6.7.0","v6.6.2","v6.6.1","v6.6.0","v6.5.2","v6.5.1","v6.5.0","v6.4.0","v6.3.1","v6.3.0","v6.2.5","v6.2.4","v6.2.3","v6.2.2","v6.2.1","v6.2.0","v6.1.0","v6.0.3","v6.0.2","v6.0.1","v6.0.0","v5.4.9","v5.4.8","v5.4.7","v5.4.6","v5.4.5","v5.4.4","v5.4.3","v5.4.2","v5.4.1","v5.4.0","v5.3.2","v5.3.1","v5.3.0","v5.2.2","v5.2.1","v5.2.0","v5.1.2","v5.1.1","v5.1.0","v5.0.4","v5.0.3","v5.0.2","v5.0.1","v5.0.0","v4.1.3","v4.1.2","v4.1.1","v4.1.0","v4.0.4","v4.0.3","v4.0.2","v4.0.1","v4.0.0","v3.2.3","v3.2.2","v3.2.1","v3.2.0","v3.1.1","v3.1.0","v3.0.5","v3.0.4","v3.0.3","v3.0.2","v3.0.1","v3.0.0","v2.8.6","v2.8.5","v2.8.4","v2.8.3","v2.8.2","v2.8.1","v2.8.0","v2.7.2","v2.7.1","v2.7.0","v2.6.2","v2.6.1","v2.5.1","v2.6.0","v2.5.0","v2.4.0","v2.3.1","v2.3.0","v2.2.7","v2.2.6","v2.2.5","v2.2.4","v2.2.3","v2.2.2","v2.2.1","v2.2.0","v2.1.0","v2.0.2","v2.0.1","v2.0.0","v1.8.0","v1.7.9","v1.7.8","v1.7.7","v1.7.6","v1.7.5","v1.7.4","v1.7.3","v1.7.2","v1.7.1","v1.7.0","v1.6.5","v1.6.4","v1.6.3","v1.6.2","v1.6.1","v1.6.0","v1.5.1","v1.5.0","v1.4.5","v1.4.4","v1.4.3","v1.4.2","v1.4.1","v1.4.0","v1.3.3","v1.3.2","v1.3.1","v1.3.0","v1.2.0","v1.1.0","v1.0.0","v0.3.0","v0.2.4","v0.2.3","v0.2.2","v0.2.1","v0.2.0","v0.1.1","v0.1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-71485.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"}]}