{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-126206","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-11-10T20:07:44.958Z","datePublished":"2026-11-12T20:51:36.537Z","dateUpdated":"2026-11-13T22:32:32.734Z"},"containers":{"cna":{"title":"Loofah allowed_uri? treats data:text/html as safe text/plain","problemTypes":[{"descriptions":[{"cweId":"CWE-79","lang":"en","description":"CWE-79: Improper Neutralization of Input During Web Page Generation","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-184","lang":"en","description":"CWE-184: Incomplete List of Disallowed Inputs","type":"CWE"}]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"PASSIVE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"LOW","subIntegrityImpact":"LOW","subAvailabilityImpact":"NONE","baseScore":5.3,"baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","version":"4.0"}}],"references":[{"name":"https://github.com/flavorjones/loofah/security/advisories/GHSA-jcff-cj73-4w4f","tags":["x_refsource_CONFIRM"],"url":"https://github.com/flavorjones/loofah/security/advisories/GHSA-jcff-cj73-4w4f"},{"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/ad92002966053309f83b550861e2ef04bc714744","tags":["x_refsource_MISC"],"url":"https://github.com/flavorjones/loofah/commit/ad92002966053309f83b550861e2ef04bc714744"},{"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":"= 2.25.2","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-11-12T20:51:36.537Z"},"descriptions":[{"lang":"en","value":"Loofah is a general library for manipulating and transforming HTML/XML documents and fragments, built on top of Nokogiri. In 2.25.2, Loofah::HTML5::Scrub.allowed_uri? treats a data URI mediatype containing the HTML5 named solidus reference / as malformed and falls back to the allowed text/plain, while a browser decodes the reference and interprets the same value as text/html. An application that validates a user-controlled URL with this helper and renders the approved value in href or another browser-interpreted URI attribute can allow cross-site scripting. Rails::HTML::Sanitizer.allowed_uri? re-exports the affected helper. Loofah's default sanitize() path is not affected because Nokogiri decodes the entity before URI validation. This issue is fixed in version 2.25.3."}],"source":{"advisory":"GHSA-jcff-cj73-4w4f","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-11-13T16:33:59.076823Z","id":"CVE-2026-126206","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"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":"2026-11-13T22:32:32.734Z"}}]}}