CVE-2026-33168

Name of the Vulnerable Software and Affected Versions Rails versions prior to 8.1.2.1 Rails versions prior to 8.0.4.1 Rails versions prior to 7.2.3.1

Description Action View tag helpers are susceptible to an issue where attribute escaping is bypassed when a blank string is used as an HTML attribute name, resulting in malformed HTML. A specially crafted attribute value could be misinterpreted by the browser as a separate attribute name, potentially leading to cross-site scripting (XSS). Applications that permit users to define custom HTML attributes are at risk.

Recommendations Update to Rails version 8.1.2.1 or later. Update to Rails version 8.0.4.1 or later. Update to Rails version 7.2.3.1 or later.