CVE-2026-33168 PUBLISHED

Action View provides conventions and helpers for building web pages with the Rails framework. Prior to versions 8.1.2.1, 8.0.4.1, and 7.2.3.1, when a blank string is used as an HTML attribute name in Action View tag helpers, the attribute escaping is bypassed, producing malformed HTML. 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 attributes are affected. Versions 8.1.2.1, 8.0.4.1, and 7.2.3.1 contain a patch.

• https://github.com/rails/rails/security/advisories/GHSA-v55j-83pf-r9cq
• https://github.com/rails/rails/commit/0b6f8002b52b9c606fd6be9e7915d9f944cf539c
• https://github.com/rails/rails/commit/63f5ad83edaa0b976f82d46988d745426aa4a42d
• https://github.com/rails/rails/commit/c79a07df1e88738df8f68cb0ee759ad6128ca924
• https://github.com/rails/rails/releases/tag/v7.2.3.1
• https://github.com/rails/rails/releases/tag/v8.0.4.1
• https://github.com/rails/rails/releases/tag/v8.1.2.1

• CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') CWE