PT-2026-60567 · Centrifugal · Centrifugo

CVE-2026-62963 · Published 2026-07-16 · Updated 2026-07-16

Mitre

CVSS v4.0

8.7

High

Base vector

AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

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.

Fix

Weakness Enumeration

CWE-409

Related Identifiers

CVE-2026-62963

Affected Products

Centrifugo

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2026-62963 · Security Note
• https://github.com/centrifugal/centrifugo/security/advisories/GHSA-q6mr-3g59-5m8x · Note
• https://github.com/centrifugal/centrifugo/releases/tag/v6.8.4 · Note
• https://github.com/centrifugal/centrifugo/pull/1162 · Note
• https://github.com/centrifugal/centrifugo/commit/46d40e4ac3a5446c9745f8b219197166ae12a6e5 · Note