{"id":"CVE-2026-54463","state":"PUBLISHED","title":"websocket-driver: Memory exhaustion via abuse of protocol length headers","description":"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.","publishedAt":"2026-07-17T20:05:17.888Z","updatedAt":"2026-07-20T16:58:33.914Z","severity":{"score":6.9,"label":"Medium","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L","source":"GitHub_M"},"assigner":"GitHub_M","products":["faye websocket-driver-ruby"],"affected":[{"vendor":"faye","product":"websocket-driver-ruby","versions":[{"version":"< 0.8.1","status":"affected"}]}],"references":["https://github.com/faye/websocket-driver-ruby/security/advisories/GHSA-ghhp-3qvg-889p","https://github.com/faye/websocket-driver-ruby/commit/d0141f041f6e3677a951255d547a313e732ccbe0"],"weaknesses":["CWE-770"],"ingestedAt":"2026-10-29T20:12:24.861Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/54xxx/CVE-2026-54463.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-54463","state":"PUBLISHED","datePublished":"2026-07-17T20:05:17.888Z","dateUpdated":"2026-07-20T16:58:33.914Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-06-15T15:30:40.319Z"},"containers":{"cna":{"title":"websocket-driver: Memory exhaustion via abuse of protocol length headers","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"faye","product":"websocket-driver-ruby","versions":[{"version":"< 0.8.1","status":"affected"}]}],"references":[{"url":"https://github.com/faye/websocket-driver-ruby/security/advisories/GHSA-ghhp-3qvg-889p","name":"https://github.com/faye/websocket-driver-ruby/security/advisories/GHSA-ghhp-3qvg-889p","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/faye/websocket-driver-ruby/commit/d0141f041f6e3677a951255d547a313e732ccbe0","name":"https://github.com/faye/websocket-driver-ruby/commit/d0141f041f6e3677a951255d547a313e732ccbe0","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"LOW","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"LOW","baseScore":6.9,"baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-770","lang":"en","description":"CWE-770: Allocation of Resources Without Limits or Throttling","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-07-17T20:05:17.888Z"},"source":{"advisory":"GHSA-ghhp-3qvg-889p","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-20T16:55:58.894089Z","id":"CVE-2026-54463","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-07-20T16:58:33.914Z"}}]}}}