{"id":"CVE-2026-54465","aliases":["GHSA-8j3g-f24p-4mpw"],"url":"https://o3.security/vulnerability/CVE-2026-54465","summary":"websocket-driver: Memory exhaustion in HTTP header parser","details":"### 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.","published":"2026-07-17T20:06:06.980Z","modified":"2026-10-28T02:30:34.381264895Z","cvss":null,"epss":{"score":0.00344,"percentile":0.27815,"asOf":"2026-09-17"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"RubyGems","name":"websocket-driver","fixedVersion":"0.8.1"}],"fix":{"url":"https://github.com/faye/websocket-driver-ruby/commit/17b569f232896e71d458404ccf4854f80e987710","label":"faye/websocket-driver-ruby@17b569f"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54465.json"},{"type":"ADVISORY","url":"https://github.com/faye/websocket-driver-ruby/security/advisories/GHSA-8j3g-f24p-4mpw"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-54465"},{"type":"FIX","url":"https://github.com/faye/websocket-driver-ruby/commit/17b569f232896e71d458404ccf4854f80e987710"},{"type":"PACKAGE","url":"https://github.com/faye/websocket-driver-ruby"},{"type":"WEB","url":"https://github.com/faye/websocket-driver-ruby/releases/tag/0.8.1"},{"type":"WEB","url":"https://github.com/rubysec/ruby-advisory-db/blob/master/gems/websocket-driver/CVE-2026-54465.yml"},{"type":"WEB","url":"https://www.cve.org/CVERecord/SearchResults?query=CVE-2026-54465"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-28T02:30:34.381264895Z"}}