ruby-websocket-driver: ### Impact If this library is used in tandem with the `permessage-deflate` extension, a WebSocket server or client c...
CVE-2026-54464 is fixed in ruby-websocket-driver on 1 platform by DEBIAN-CVE-2026-54464 (version 0.8.1-1), released July 19, 2026. It is not reported as exploited. Patch Radar priority: Routine.
### 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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| ruby-websocket-driver · Debian 14 | 0.8.1-1 | DEBIAN-CVE-2026-54464 | Jul 19, 2026 |
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