CVE-2026-54464

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Source
https://cve.org/CVERecord?id=CVE-2026-54464
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54464.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-54464
Aliases
Downstream
Published
2026-07-17T20:03:36.326Z
Modified
2026-07-22T05:29:56.252046775Z
Severity
  • 6.3 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L CVSS Calculator
Summary
websocket-driver: Resource limit bypass via message compression
Details

Impact

If this library is used in tandem with the permessage-deflate extension, a WebSocket server or client can be made to accept messages that are larger than the configured maximum message size. This is because this limit is checked against the message frames' length headers, which give the size of the compressed data, not the size after decompression. This can lead to applications accepting larger messages than expected and exceeding their intended resource usage.

Patches

The issue has been patched in version 0.8.1, by checking the length of messages after they are processed by incoming extensions. All users should upgrade to this version.

Workarounds

No known workarounds exist.

Acknowledgements

This issue was discovered and reported by Pranjali Thakur, DepthFirst Security Research Team.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54464.json",
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-770"
    ]
}
References

Affected packages

Git / github.com/faye/websocket-driver-ruby

Affected ranges

Type
GIT
Repo
https://github.com/faye/websocket-driver-ruby
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
fa8641724f10bf3273585f1dcf9041f540bbd036
Database specific 
{
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ],
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "0.8.1"
        }
    ]
}

Affected versions

0.*
0.0.0
0.1.0
0.2.0
0.2.1
0.2.2
0.2.3
0.3.0
0.3.1
0.3.2
0.3.3
0.3.4
0.3.5
0.4.0
0.5.0
0.5.1
0.5.2
0.5.3
0.5.4
0.6.0
0.6.1
0.6.2
0.6.3
0.6.4
0.6.5
0.7.0
0.7.1
0.7.2
0.7.3
0.7.4
0.7.5
0.7.6
0.7.7
0.8.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54464.json"