{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-126205","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-11-10T20:07:44.958Z","datePublished":"2026-11-12T20:41:25.574Z","dateUpdated":"2026-11-12T20:41:25.574Z"},"containers":{"cna":{"title":"Loofah: Regular expression denial of service in the SVG local-reference check","problemTypes":[{"descriptions":[{"cweId":"CWE-400","lang":"en","description":"CWE-400: Uncontrolled Resource Consumption","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-1333","lang":"en","description":"CWE-1333: Inefficient Regular Expression Complexity","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":5.3,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","version":"3.1"}}],"references":[{"name":"https://github.com/flavorjones/loofah/security/advisories/GHSA-mf2j-8f84-cc9q","tags":["x_refsource_CONFIRM"],"url":"https://github.com/flavorjones/loofah/security/advisories/GHSA-mf2j-8f84-cc9q"},{"name":"https://github.com/flavorjones/loofah/pull/324","tags":["x_refsource_MISC"],"url":"https://github.com/flavorjones/loofah/pull/324"},{"name":"https://github.com/flavorjones/loofah/commit/2f31e7fae36036c9882d3d0fae720e1014c57cd1","tags":["x_refsource_MISC"],"url":"https://github.com/flavorjones/loofah/commit/2f31e7fae36036c9882d3d0fae720e1014c57cd1"},{"name":"https://github.com/flavorjones/loofah/releases/tag/v2.25.3","tags":["x_refsource_MISC"],"url":"https://github.com/flavorjones/loofah/releases/tag/v2.25.3"}],"affected":[{"vendor":"flavorjones","product":"loofah","versions":[{"version":"< 2.25.3","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-11-12T20:41:25.574Z"},"descriptions":[{"lang":"en","value":"Loofah is a general library for manipulating and transforming HTML/XML documents and fragments, built on top of Nokogiri. Prior to 2.25.3, the Loofah HTML5 sanitizer checks href and xlink:href on elements in SVG_ALLOW_LOCAL_HREF with a regular expression whose line anchor and newline-matching whitespace cause an all-whitespace value to be rescanned from every line start. An attacker can submit an SVG reference element with a long multiline-whitespace attribute and consume CPU quadratically during sanitization. CRuby 3.1 and earlier and JRuby are affected, while CRuby 3.2 and later uses linear-time regular-expression matching. The default safelist reaches the vulnerable check without a configuration change. This issue is fixed in version 2.25.3."}],"source":{"advisory":"GHSA-mf2j-8f84-cc9q","discovery":"UNKNOWN"}}}}