GHSA-qmpg-8xg6-ph5q

Trix has a Stored XSS vulnerability through serialized attributes

Source: GitHub Advisory Database (reviewed) Moderate CVE-2026-73426

Packages

Ecosystem	Package	Affected	Fixed in
RubyGems	action_text-trix	< 2.1.17	2.1.17
npm	trix	< 2.1.17	2.1.17

Details

As written in the advisory (Markdown source, shown as plain text).

### Impact The Trix editor, in versions prior to 2.1.17, is vulnerable to XSS attacks when a `data-trix-serialized-attributes` attribute bypasses the DOMPurify sanitizer. An attacker could craft HTML containing a `data-trix-serialized-attributes` attribute with a malicious payload that, when the content is rendered, could execute arbitrary JavaScript code within the context of the user's session, potentially leading to unauthorized actions being performed or sensitive information being disclosed. ### Patches Update Recommendation: Users should upgrade to Trix editor version 2.1.17 or later. ### References The XSS vulnerability was responsibly reported by Hackerone researcher [newbiefromcoma](https://hackerone.com/newbiefromcoma).

References

External links from the advisory. They lead to third-party sites.