CVE-2026-73426
Trix: Stored XSS vulnerability through serialized attributes
- State
- Published
- Severity
- 4.6 Medium
- Published
- Aug 18, 2026
- Updated
- Aug 18, 2026
- Reserved
- Aug 12, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 4.6 Medium | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N | GitHub_M |
Weaknesses
- CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Products
| Product | Versions |
|---|---|
trixbasecamp |
|
References
- https://github.com/basecamp/trix/security/advisories/GHSA-qmpg-8xg6-ph5q
- https://github.com/basecamp/trix/pull/1282
- https://github.com/basecamp/trix/commit/3229c29c771ded4d247ed79b2ccd2cd05c4e74b4
- https://github.com/basecamp/trix/commit/53197ab5a142e6b0b76127cb790726b274eaf1bc
- https://github.com/basecamp/trix/releases/tag/v2.1.17
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