{"id":"CVE-2026-61666","title":"websocket-driver is a WebSocket protocol handler with pluggable I/O","summary":"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 …","severity":"high","cwe":["CWE-248","CWE-20"],"vendor":"websocket-driver","product":"websocket-driver","affected":["websocket-driver < 0.8.2"],"patched":["websocket-driver 0.8.2"],"published":"2026-08-17","updated":"2026-09-10","sourceUpdated":"2026-09-10T20:30:11.423","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-61666","references":[{"url":"https://github.com/faye/websocket-driver-ruby/commit/7d6fd87759a2fdc83590d3b49ffa661dc53fa128","label":"security-advisories@github.com"},{"url":"https://github.com/faye/websocket-driver-ruby/security/advisories/GHSA-2x63-gw47-w4mm","label":"security-advisories@github.com"},{"url":"https://github.com/advisories/GHSA-2x63-gw47-w4mm"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-61666.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-61666"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2510734"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-61666"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-61666"}],"tags":["nvd","ghsa","rubygems","csaf","vex","red-hat"],"epss":0.00338,"epssPercentile":0.27258,"aliases":["GHSA-2x63-gw47-w4mm"],"ecosystem":"rubygems","ingestedAt":"2026-07-21T18:53:06.584Z","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","slug":"CVE-2026-61666","body":"## Overview\n\nwebsocket-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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-61666)\n\nAffected packages:\n\n- `websocket-driver < 0.8.2`\n\nPatched in:\n\n- `websocket-driver 0.8.2`\n\nSource: https://github.com/advisories/GHSA-2x63-gw47-w4mm\n\n## Vendor advisories\n\n- **Red Hat VEX** · Important · affected: Red Hat 3scale API Management Platform 2, Red Hat Satellite 6 · updated 2026-09-18 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-61666.json)","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":208159,"id":"CVE-2026-61666","ts":1789922725482,"field":"cvss","old":null,"new":"7.5"}]}