CVE-2026-54464 Details
Description
### 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.
A vulnerability in the Faye WebSocket Driver for Ruby, affecting versions prior to 0.8.1, allows WebSocket servers or clients to accept messages larger than the maximum configured size. This issue arises when the 'permessage-deflate' extension is used, as the size limit is enforced based on the length headers of the compressed data, rather than the decompressed size. Consequently, applications may inadvertently accept oversized messages, leading to excessive resource consumption.
Users are advised to upgrade to version 0.8.1 or later, where this issue has been addressed by modifying the message length check to occur after processing by incoming extensions.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Jul 17, 2026CISA-ADP
Assessed Jul 21, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/faye/websocket-driver-ruby/commit/fa8641724f10bf3273585f1dcf9041f540bbd036 | [email protected] | Source CodeVendor |
| https://github.com/faye/websocket-driver-ruby/security/advisories/GHSA-33ph-fccm-39pj | [email protected] | AdvisoryRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-770 | Allocation of Resources Without Limits or Throttling | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Faye websocket-driver-ruby | < 0.8.1 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 21, 2026 | CVE Modified | CISA-ADP |
| Jul 17, 2026 | New CVE Received | [email protected] |