{"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":"websocket-driver is a WebSocket protocol handler with pluggable I/O. Prior to 0.8.1, draft versions of the WebSocket protocol in websocket-driver include a length header that allows an arbitrarily large integer to be encoded as bytes with the high bit set, and a server or client can send an indefinite sequence of 0x80 or higher bytes that the peer parses into an ever-growing Ruby integer. This can make a WebSocket connection consume an unbounded amount of memory and lead to the host process running out of memory. This issue is fixed in version 0.8.1.","published":"2026-07-17T20:05:17.888Z","modified":"2026-08-12T21:26:55.403531483Z","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"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T21:26:55.403531483Z"}}