{"id":"CVE-2026-61666","summary":"websocket-driver: Denial of service via malformed Host header","details":"websocket-driver is a WebSocket protocol handler with pluggable I/O. Prior to 0.8.2, WebSocket::Driver.server() passes a malformed Host header to URI.parse in lib/websocket/http/request.rb without catching URI::InvalidURIError, allowing a remote client to crash a TCP-backed WebSocket server when the application does not catch the error from parse(). This issue is fixed in version 0.8.2.","aliases":["GHSA-2x63-gw47-w4mm"],"modified":"2026-08-19T03:48:35.412842948Z","published":"2026-08-17T16:16:33.374Z","related":["CGA-8jgj-jjqh-5vq2"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/61xxx/CVE-2026-61666.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-248"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/61xxx/CVE-2026-61666.json"},{"type":"ADVISORY","url":"https://github.com/faye/websocket-driver-ruby/security/advisories/GHSA-2x63-gw47-w4mm"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-61666"},{"type":"FIX","url":"https://github.com/faye/websocket-driver-ruby/commit/7d6fd87759a2fdc83590d3b49ffa661dc53fa128"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/faye/websocket-driver-ruby","events":[{"introduced":"0"},{"fixed":"7d6fd87759a2fdc83590d3b49ffa661dc53fa128"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"0.8.2"}],"source":["AFFECTED_FIELD","REFERENCES"]}}],"versions":["0.8.1","0.8.0","0.7.7","0.7.6","0.7.5","0.7.4","0.7.3","0.7.2","0.7.1","0.7.0","0.6.5","0.6.4","0.6.3","0.6.2","0.6.1","0.6.0","0.5.4","0.5.3","0.5.2","0.5.1","0.5.0","0.4.0","0.3.5","0.3.4","0.3.3","0.3.2","0.3.1","0.3.0","0.2.3","0.2.2","0.2.1","0.2.0","0.1.0","0.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-61666.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H"}]}