CVE-2026-73426

Description

Trix is a what-you-see-is-what-you-get rich text editor for everyday writing. Prior to 2.1.17, Trix is vulnerable to cross-site scripting when a data-trix-serialized-attributes attribute bypasses the DOMPurify sanitizer. An attacker can craft HTML containing a data-trix-serialized-attributes attribute with a malicious payload that, when rendered, executes arbitrary JavaScript in the user's session and may perform unauthorized actions or disclose sensitive information. This issue is fixed in version 2.1.17.

References

• https://github.com/basecamp/trix/commit/3229c29c771ded4d247ed79b2ccd2cd05c4e74b4
• https://github.com/basecamp/trix/commit/53197ab5a142e6b0b76127cb790726b274eaf1bc
• https://github.com/basecamp/trix/pull/1282
• https://github.com/basecamp/trix/releases/tag/v2.1.17
• https://github.com/basecamp/trix/security/advisories/GHSA-qmpg-8xg6-ph5q