CVE-2026-62963

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Source
https://cve.org/CVERecord?id=CVE-2026-62963
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-62963.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-62963
Aliases
  • GHSA-q6mr-3g59-5m8x
Published
2026-07-16T19:34:48.882Z
Modified
2026-07-19T03:31:16.211176957Z
Severity
  • 8.7 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
Summary
Centrifugo: Decompression bomb DoS via permessage-deflate in unidirectional WebSocket transport
Details

Centrifugo is an open-source scalable real-time messaging server. Prior to 6.8.4, Centrifugo unidirectional WebSocket transport with uniwebsocket.compression enabled enforced uniwebsocket.messagesizelimit 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.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/62xxx/CVE-2026-62963.json",
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-409"
    ]
}
References

Affected packages

Git / github.com/centrifugal/centrifugo

Affected ranges

Type
GIT
Repo
https://github.com/centrifugal/centrifugo
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
46d40e4ac3a5446c9745f8b219197166ae12a6e5
Fixed
9f72c667a306b450768a3dc462c9bc120f057de3
Database specific 
{
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ],
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "6.8.4"
        }
    ]
}

Affected versions

v0.*
v0.1.0
v0.1.1
v0.2.0
v0.2.1
v0.2.2
v0.2.3
v0.2.4
v0.3.0
v1.*
v1.0.0
v1.1.0
v1.2.0
v1.3.0
v1.3.1
v1.3.2
v1.3.3
v1.4.0
v1.4.1
v1.4.2
v1.4.3
v1.4.4
v1.4.5
v1.5.0
v1.5.1
v1.6.0
v1.6.1
v1.6.2
v1.6.3
v1.6.4
v1.6.5
v1.7.0
v1.7.1
v1.7.2
v1.7.3
v1.7.4
v1.7.5
v1.7.6
v1.7.7
v1.7.8
v1.7.9
v1.8.0
v2.*
v2.0.0
v2.0.1
v2.0.2
v2.1.0
v2.2.0
v2.2.1
v2.2.2
v2.2.3
v2.2.4
v2.2.5
v2.2.6
v2.2.7
v2.3.0
v2.3.1
v2.4.0
v2.5.0
v2.5.1
v2.6.0
v2.6.1
v2.6.2
v2.7.0
v2.7.1
v2.7.2
v2.8.0
v2.8.1
v2.8.2
v2.8.3
v2.8.4
v2.8.5
v2.8.6
v3.*
v3.0.0
v3.0.1
v3.0.2
v3.0.3
v3.0.4
v3.0.5
v3.1.0
v3.1.1
v3.2.0
v3.2.1
v3.2.2
v3.2.3
v4.*
v4.0.0
v4.0.1
v4.0.2
v4.0.3
v4.0.4
v4.1.0
v4.1.1
v4.1.2
v4.1.3
v5.*
v5.0.0
v5.0.1
v5.0.2
v5.0.3
v5.0.4
v5.1.0
v5.1.1
v5.1.2
v5.2.0
v5.2.1
v5.2.2
v5.3.0
v5.3.1
v5.3.2
v5.4.0
v5.4.1
v5.4.2
v5.4.3
v5.4.4
v5.4.5
v5.4.6
v5.4.7
v5.4.8
v5.4.9
v6.*
v6.0.0
v6.0.1
v6.0.2
v6.0.3
v6.1.0
v6.2.0
v6.2.1
v6.2.2
v6.2.3
v6.2.4
v6.2.5
v6.3.0
v6.3.1
v6.4.0
v6.5.0
v6.5.1
v6.5.2
v6.6.0
v6.6.1
v6.6.2
v6.7.0
v6.7.1
v6.7.2
v6.8.0
v6.8.1
v6.8.2
v6.8.3

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-62963.json"