{"attribution":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","cve":{"id":"CVE-2026-126079","sourceIdentifier":"security-advisories@github.com","published":"2026-11-10T21:19:26.513","lastModified":"2026-11-10T21:19:26.513","vulnStatus":"Received","cveTags":[],"descriptions":[{"lang":"en","value":"Action View is a framework for handling view template lookup and rendering and provides view helpers for building HTML. Prior to 8.1.4.1 and 8.0.5.2, with the HTML5 sanitizer (Rails::HTML5::Sanitizer, the default vendor on CRuby for applications using load_defaults 7.1 or later), Nokogiri before 1.19.5 serializes \u003c and \u003e unescaped inside attribute values. The Action View text helpers highlight and simple_format sanitize their input and then process the resulting HTML as a string: highlight splits it on tag boundaries to insert matches, and simple_format splits it into paragraphs on blank lines. An unescaped \u003e or a blank line inside an attribute value could cause markup in that value, which the sanitizer left inert, to be emitted as live elements in the helper's html_safe output, possibly leading to XSS. Applications that use the HTML5 sanitizer and pass untrusted text to highlight, or to simple_format with html_options, are affected. This issue is fixed in versions 8.1.4.1 and 8.0.5.2."}],"affected":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"rails","product":"rails","versions":[{"version":"\u003c 8.0.5.2","status":"affected"},{"version":"\u003e= 8.1, \u003c 8.1.4.1","status":"affected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","baseScore":6.1,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"CHANGED","confidentialityImpact":"LOW","integrityImpact":"LOW","availabilityImpact":"NONE"},"exploitabilityScore":2.8,"impactScore":2.7}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Primary","description":[{"lang":"en","value":"CWE-79"}]}],"references":[{"url":"http://github.com/rails/rails/commit/adc3a32d4abea77ed3aacf6f5fb71cfc005bef73","source":"security-advisories@github.com"},{"url":"https://github.com/rails/rails/commit/009ea68342d05d02087c04dae7faaa4e4c1def11","source":"security-advisories@github.com"},{"url":"https://github.com/rails/rails/releases/tag/v8.0.5.2","source":"security-advisories@github.com"},{"url":"https://github.com/rails/rails/releases/tag/v8.1.4.1","source":"security-advisories@github.com"},{"url":"https://github.com/rails/rails/security/advisories/GHSA-2p2f-4rq4-gjwc","source":"security-advisories@github.com"}]}}