{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-126207","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-11-10T20:07:44.958Z","datePublished":"2026-11-12T20:53:55.553Z","dateUpdated":"2026-11-13T19:43:00.397Z"},"containers":{"cna":{"title":"Loofah: CSS url() sanitization bypass via escaped parentheses","problemTypes":[{"descriptions":[{"cweId":"CWE-180","lang":"en","description":"CWE-180: Incorrect Behavior Order: Validate Before Canonicalize","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-184","lang":"en","description":"CWE-184: Incomplete List of Disallowed Inputs","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":4.7,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N","version":"3.1"}}],"references":[{"name":"https://github.com/flavorjones/loofah/security/advisories/GHSA-m3x9-938q-5767","tags":["x_refsource_CONFIRM"],"url":"https://github.com/flavorjones/loofah/security/advisories/GHSA-m3x9-938q-5767"},{"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/b198a36e44c9c5408163ac50787825e8ca0b166b","tags":["x_refsource_MISC"],"url":"https://github.com/flavorjones/loofah/commit/b198a36e44c9c5408163ac50787825e8ca0b166b"},{"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":"2026-11-12T20:53:55.553Z"},"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, Loofah::HTML5::Scrub.scrub_css checks only the first parse of a style attribute, then rebuilds CSS with identifier escapes decoded so escaped parentheses, property names, comments, or quotes can become a live url() without a second safety check. An attacker can use list-style to make a viewer's browser request an attacker-chosen URL when content renders, or cursor to make the request on hover. The request can disclose the viewer's IP address, user agent, access timing, and access to internal-network hosts, but no script survives sanitization and the attacker cannot read the response. This issue is fixed in version 2.25.3."}],"source":{"advisory":"GHSA-m3x9-938q-5767","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-11-13T19:42:04.755994Z","id":"CVE-2026-126207","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-11-13T19:43:00.397Z"}}]}}