Vulnerability Description
Centrifugo is an open-source scalable real-time messaging server. Prior to 6.8.4, Centrifugo unidirectional WebSocket transport with uni_websocket.compression enabled enforced uni_websocket.message_size_limit against compressed wire-frame length in internal/websocket/conn.go advanceFrame, but ReadMessage used io.ReadAll after decompression without an output cap, allowing unauthenticated requests to /connection/uni_websocket to trigger large memory and CPU consumption. This issue is fixed in version 6.8.4.
Related Weaknesses (CWE)
References
- https://github.com/centrifugal/centrifugo/commit/46d40e4ac3a5446c9745f8b21919716
- https://github.com/centrifugal/centrifugo/pull/1162
- https://github.com/centrifugal/centrifugo/releases/tag/v6.8.4
- https://github.com/centrifugal/centrifugo/security/advisories/GHSA-q6mr-3g59-5m8
FAQ
What is CVE-2026-62963?
CVE-2026-62963 is a documented vulnerability. Centrifugo is an open-source scalable real-time messaging server. Prior to 6.8.4, Centrifugo unidirectional WebSocket transport with uni_websocket.compression enabled enforced uni_websocket.message_si...
How severe is CVE-2026-62963?
CVSS scoring is not yet available for CVE-2026-62963. Check NVD for updates.
Is there a patch for CVE-2026-62963?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.