{"id":"CVE-2026-54465","aliases":["GHSA-8j3g-f24p-4mpw"],"title":"websocket-driver: Memory exhaustion in HTTP header parser","summary":"websocket-driver: Memory exhaustion in HTTP header parser","severity":"medium","cwe":["CWE-400"],"vendor":"websocket-driver","product":"websocket-driver","ecosystem":"rubygems","affected":["websocket-driver < 0.8.1"],"patched":["websocket-driver 0.8.1"],"published":"2026-07-15","updated":"2026-07-15","source":"GHSA","sourceUrl":"https://github.com/advisories/GHSA-8j3g-f24p-4mpw","references":[{"url":"https://github.com/faye/websocket-driver-ruby/security/advisories/GHSA-8j3g-f24p-4mpw"},{"url":"https://github.com/faye/websocket-driver-ruby/releases/tag/0.8.1"},{"url":"https://github.com/rubysec/ruby-advisory-db/blob/master/gems/websocket-driver/CVE-2026-54465.yml"},{"url":"https://www.cve.org/CVERecord/SearchResults?query=CVE-2026-54465"},{"url":"https://github.com/advisories/GHSA-8j3g-f24p-4mpw"}],"tags":["ghsa","rubygems"],"ingestedAt":"2026-07-15T22:46:58.810Z","epss":0.00344,"epssPercentile":0.2801,"slug":"CVE-2026-54465","body":"## Overview\n\n### Impact\n\nIf this library is used to implement a WebSocket server on top of a TCP server (rather than an HTTP server or framework) using the `WebSocket::Driver.server()` method, or, if it is used to complement a WebSocket client, then a peer can make a single connection consume an unbounded amount of memory by sending an HTTP request or response with a never-ending list of headers. This can lead to the receiving process running out of memory.\n\n### Patches\n\nThe issue has been patched in version 0.8.1, by limiting the total size of HTTP request/response lines and headers accepted by the parser to 32 kB. All users should upgrade to this version.\n\n### Workarounds\n\nNo known workarounds exist.\n\n### Acknowledgements\n\nThis issue was discovered and reported by Pranjali Thakur, DepthFirst Security Research Team.\n\n## Affected packages\n\n- `websocket-driver < 0.8.1`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `websocket-driver 0.8.1`","depth":"sunlit","depthScore":28,"depthScoreParts":{"impact":27.5,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}