{"id":"CVE-2026-126069","published":"2026-11-10T21:19:24.960","lastModified":"2026-11-10T21:19:24.960","description":"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, the fix for CVE-2026-33168 skips blank HTML attribute names in Action View tag helpers, but it tests the name before converting it to a string. A Symbol name made only of whitespace, such as :\" \", is not blank, because Symbol#blank? is Symbol#empty?, so it reaches the attribute escaping, which emits an attribute with no name and produces malformed HTML. The asset tag helpers, such as image_tag, video_tag and audio_tag, symbolize their options, so a whitespace String name passed to them takes the same path. A carefully crafted attribute value could then be misinterpreted by the browser as a separate attribute name, possibly leading to XSS. Applications that allow users to specify custom HTML attribute names are affected. This issue is fixed in versions 8.1.4.1 and 8.0.5.2.","cvssScore":4.7,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N","cwes":["CWE-79"],"vendors":[],"products":[],"references":[{"url":"https://github.com/rails/rails/commit/9190210606ffe52f92fdc75637f8ff69404f22c8","tags":[]},{"url":"https://github.com/rails/rails/commit/f47452533e1f28d847c63181b9d5f8b7243ef9a4","tags":[]},{"url":"https://github.com/rails/rails/releases/tag/v8.0.5.2","tags":[]},{"url":"https://github.com/rails/rails/releases/tag/v8.1.4.1","tags":[]},{"url":"https://github.com/rails/rails/security/advisories/GHSA-68p9-83h6-5wpj","tags":[]}],"exploitRefs":[{"url":"https://github.com/rails/rails/commit/9190210606ffe52f92fdc75637f8ff69404f22c8","tags":[]},{"url":"https://github.com/rails/rails/commit/f47452533e1f28d847c63181b9d5f8b7243ef9a4","tags":[]},{"url":"https://github.com/rails/rails/releases/tag/v8.0.5.2","tags":[]},{"url":"https://github.com/rails/rails/releases/tag/v8.1.4.1","tags":[]},{"url":"https://github.com/rails/rails/security/advisories/GHSA-68p9-83h6-5wpj","tags":[]}],"hasPoc":true,"ai":null}