{"affected":[{"product":"nokogiri","source":"CNA: GitHub_M","vendor":"sparklemotion","versions":[{"status":"affected","version":">= 1.12.0, < 1.19.5"}]},{"ecosystem":"rubygems","packageName":"nokogiri","product":"nokogiri","source":"GitHub GHSA-4p39-36wj-23h4","vendor":"","versions":[{"status":"affected","version":">= 1.12.0, < 1.19.5","versionType":"GitHub advisory range"}]},{"defaultStatus":"unaffected","ecosystem":"RubyGems","packageName":"nokogiri","product":"nokogiri","source":"OSV GHSA-4p39-36wj-23h4","vendor":"","versions":[{"status":"affected","version":"1.12.0","versionType":"RubyGems"},{"status":"affected","version":"1.12.1","versionType":"RubyGems"},{"status":"affected","version":"1.12.2","versionType":"RubyGems"},{"status":"affected","version":"1.12.3","versionType":"RubyGems"},{"status":"affected","version":"1.12.4","versionType":"RubyGems"},{"status":"affected","version":"1.12.5","versionType":"RubyGems"},{"status":"affected","version":"1.13.0","versionType":"RubyGems"},{"status":"affected","version":"1.13.1","versionType":"RubyGems"},{"status":"affected","version":"1.13.10","versionType":"RubyGems"},{"status":"affected","version":"1.13.2","versionType":"RubyGems"},{"status":"affected","version":"1.13.3","versionType":"RubyGems"},{"status":"affected","version":"1.13.4","versionType":"RubyGems"},{"status":"affected","version":"1.13.5","versionType":"RubyGems"},{"status":"affected","version":"1.13.6","versionType":"RubyGems"},{"status":"affected","version":"1.13.7","versionType":"RubyGems"},{"status":"affected","version":"1.13.8","versionType":"RubyGems"},{"status":"affected","version":"1.13.9","versionType":"RubyGems"},{"status":"affected","version":"1.14.0","versionType":"RubyGems"},{"status":"affected","version":"1.14.0.rc1","versionType":"RubyGems"},{"status":"affected","version":"1.14.1","versionType":"RubyGems"},{"status":"affected","version":"1.14.2","versionType":"RubyGems"},{"status":"affected","version":"1.14.3","versionType":"RubyGems"},{"status":"affected","version":"1.14.4","versionType":"RubyGems"},{"status":"affected","version":"1.14.5","versionType":"RubyGems"},{"status":"affected","version":"1.15.0","versionType":"RubyGems"},{"status":"affected","version":"1.15.1","versionType":"RubyGems"},{"status":"affected","version":"1.15.2","versionType":"RubyGems"},{"status":"affected","version":"1.15.3","versionType":"RubyGems"},{"status":"affected","version":"1.15.4","versionType":"RubyGems"},{"status":"affected","version":"1.15.5","versionType":"RubyGems"},{"status":"affected","version":"1.15.6","versionType":"RubyGems"},{"status":"affected","version":"1.15.7","versionType":"RubyGems"},{"status":"affected","version":"1.16.0","versionType":"RubyGems"},{"status":"affected","version":"1.16.0.rc1","versionType":"RubyGems"},{"status":"affected","version":"1.16.1","versionType":"RubyGems"},{"status":"affected","version":"1.16.2","versionType":"RubyGems"},{"status":"affected","version":"1.16.3","versionType":"RubyGems"},{"status":"affected","version":"1.16.4","versionType":"RubyGems"},{"status":"affected","version":"1.16.5","versionType":"RubyGems"},{"status":"affected","version":"1.16.6","versionType":"RubyGems"},{"status":"affected","version":"1.16.7","versionType":"RubyGems"},{"status":"affected","version":"1.16.8","versionType":"RubyGems"},{"status":"affected","version":"1.17.0","versionType":"RubyGems"},{"status":"affected","version":"1.17.1","versionType":"RubyGems"},{"status":"affected","version":"1.17.2","versionType":"RubyGems"},{"status":"affected","version":"1.18.0","versionType":"RubyGems"},{"status":"affected","version":"1.18.0.rc1","versionType":"RubyGems"},{"status":"affected","version":"1.18.1","versionType":"RubyGems"},{"status":"affected","version":"1.18.10","versionType":"RubyGems"},{"status":"affected","version":"1.18.2","versionType":"RubyGems"},{"status":"affected","version":"1.18.3","versionType":"RubyGems"},{"status":"affected","version":"1.18.4","versionType":"RubyGems"},{"status":"affected","version":"1.18.5","versionType":"RubyGems"},{"status":"affected","version":"1.18.6","versionType":"RubyGems"},{"status":"affected","version":"1.18.7","versionType":"RubyGems"},{"status":"affected","version":"1.18.8","versionType":"RubyGems"},{"status":"affected","version":"1.18.9","versionType":"RubyGems"},{"status":"affected","version":"1.19.0","versionType":"RubyGems"},{"status":"affected","version":"1.19.1","versionType":"RubyGems"},{"status":"affected","version":"1.19.2","versionType":"RubyGems"},{"status":"affected","version":"1.19.3","versionType":"RubyGems"},{"status":"affected","version":"1.19.4","versionType":"RubyGems"},{"events":[{"introduced":"1.12.0"},{"fixed":"1.19.5"}],"status":"unknown","version":"1.12.0","versionType":"ECOSYSTEM"}]}],"cveId":"CVE-2026-126063","cwes":["CWE-79","CWE-116"],"description":"Nokogiri is an open source XML and HTML library for the Ruby programming language. From 1.12.0 until 1.19.5, the C extension on CRuby and TruffleRuby has a Nokogiri::HTML5 serializer that does not escape text inside noscript elements or angle brackets inside attribute values. When an application sanitizes untrusted HTML with the default parsing options, allows noscript, and sends serialized output to a scripting-enabled browser, the browser can parse markup that Nokogiri did not produce, enabling mutation cross-site scripting. Using parse_noscript_content_as_text: true is the recommended workaround, not the vulnerable default. JRuby is not affected because it does not implement Nokogiri::HTML5. This issue is fixed in version 1.19.5.","epss":{"date":"2026-11-13","percentile":0.47236,"score":0.00561},"exploits":[],"kev":null,"metrics":[{"score":2.3,"severity":"low","source":"CNA: GitHub_M","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","version":"4.0"},{"score":2.3,"severity":"low","source":"NVD: security-advisories@github.com","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","version":"4.0"}],"modifiedAt":1794585103029,"publishedAt":1794341680408,"references":[{"source":"CNA: GitHub_M","tags":["x_refsource_CONFIRM"],"url":"https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-4p39-36wj-23h4"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/sparklemotion/nokogiri/pull/3752"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/sparklemotion/nokogiri/commit/3e84df6ff7ab4d78f446e3a415430bd69a055d32"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/sparklemotion/nokogiri/commit/c6c0bffbdcd194694995acafeeed27326b0805f8"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/sparklemotion/nokogiri/releases/tag/v1.19.5"},{"source":"security-advisories@github.com","tags":[],"url":"https://github.com/sparklemotion/nokogiri/commit/3e84df6ff7ab4d78f446e3a415430bd69a055d32"},{"source":"security-advisories@github.com","tags":[],"url":"https://github.com/sparklemotion/nokogiri/commit/c6c0bffbdcd194694995acafeeed27326b0805f8"},{"source":"security-advisories@github.com","tags":[],"url":"https://github.com/sparklemotion/nokogiri/pull/3752"},{"source":"security-advisories@github.com","tags":[],"url":"https://github.com/sparklemotion/nokogiri/releases/tag/v1.19.5"},{"source":"security-advisories@github.com","tags":[],"url":"https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-4p39-36wj-23h4"},{"source":"GitHub Security Advisories","tags":["advisory"],"url":"https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-4p39-36wj-23h4"},{"source":"OSV / GitHub Security Advisories","tags":["advisory"],"url":"https://github.com/advisories/GHSA-4p39-36wj-23h4"},{"source":"OSV / GitHub Security Advisories","tags":["osv"],"url":"https://osv.dev/vulnerability/GHSA-4p39-36wj-23h4"}],"remediation":[{"kind":"fix","source":"GitHub GHSA-4p39-36wj-23h4","text":"nokogiri (rubygems): GitHub reports patched versions 1.19.5. Check the advisory for the affected release branch.","url":"https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-4p39-36wj-23h4"},{"kind":"fix","source":"OSV GHSA-4p39-36wj-23h4","text":"nokogiri (RubyGems): OSV reports a fixed version 1.19.5. Check the advisory for supported release branches.","url":"https://github.com/advisories/GHSA-4p39-36wj-23h4"}],"revision":"e94c35edb57c828fa00916f3b45645ae1ac7f077bc10f4401a0e1c93a6bb6af8","sources":[{"modifiedAt":1794585103029,"name":"CNA: GitHub_M","retrievedAt":1794586188961,"url":"https://www.cve.org/CVERecord?id=CVE-2026-126063"},{"modifiedAt":1794521915610,"name":"NVD","retrievedAt":1794529312348,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-126063"},{"modifiedAt":1794341636000,"name":"GitHub Security Advisories","retrievedAt":1794532209609,"url":"https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-4p39-36wj-23h4"},{"modifiedAt":1794344404024,"name":"OSV / GitHub Security Advisories","retrievedAt":1794346829623,"url":"https://osv.dev/vulnerability/GHSA-4p39-36wj-23h4"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1794586222188,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-126063"}],"ssvc":{"assessedAt":1794584965822,"automatable":"no","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"Nokogiri: Mutation XSS through `noscript` content in Nokogiri's HTML5 serializer","updatedAt":1794586222188}