{"id":"CVE-2026-54463","aliases":["GHSA-ghhp-3qvg-889p"],"url":"https://o3.security/vulnerability/CVE-2026-54463","summary":"websocket-driver: Memory exhaustion via abuse of protocol length headers","details":"### Impact\n\nThe frame format in draft versions of the WebSocket protocol includes a length header that allows an arbitrarily large integer to be encoded as a sequence of bytes with the high bit set. By sending an indefinite sequence of bytes with values `0x80` or above, a server or client can make the other peer parse these bytes into an ever-growing integer. Since Ruby integers are arbitrary precision, this can be used to make a WebSocket connection consume an unbounded amount of memory and lead to the host process running out of memory.\n\n### Patches\n\nThe issue has been patched in version 0.8.1. 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":"2026-07-17T20:05:17.888Z","modified":"2026-10-28T02:31:05.485204596Z","cvss":null,"epss":{"score":0.00344,"percentile":0.27816,"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/d0141f041f6e3677a951255d547a313e732ccbe0","label":"faye/websocket-driver-ruby@d0141f0"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54463.json"},{"type":"ADVISORY","url":"https://github.com/faye/websocket-driver-ruby/security/advisories/GHSA-ghhp-3qvg-889p"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-54463"},{"type":"FIX","url":"https://github.com/faye/websocket-driver-ruby/commit/d0141f041f6e3677a951255d547a313e732ccbe0"},{"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-2026-54463.yml"},{"type":"WEB","url":"https://www.cve.org/CVERecord/SearchResults?query=CVE-2026-54463"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-28T02:31:05.485204596Z"}}