CVE-2026-73428
CVE-2026-73428 · Trix: Stored XSS via HTMLParser attribute injection on paste
This page contains facts from public vulnerability sources. Check the original advisory before updating.
Trix is a what-you-see-is-what-you-get rich text editor for everyday writing. Prior to 2.1.18, Trix is vulnerable to stored cross-site scripting when crafted HTML is pasted into the editor. HTMLParser processes a mock attachment in a `<span>` with an empty `data-trix-attachment="{}"` value, causing data-trix-attributes to be applied to a plain string piece. StringPiece.fromJSON accepts an unvalidated href, allowing a javascript: URI to enter the document model and serialized HTML and execute when another user renders and clicks the content. Applications that apply server-side HTML sanitization can neutralize the payload on save. This issue is fixed in version 2.1.18.
CVSS 4.6 · Medium · EPSS 0.4% · Fix available
- Published
- Updated
Stack: node
Affected products and versions
trix
- Versions
- < 2.1.18: Affected
No fix published
trix npm
- Affected ranges
- SEMVER: < 2.1.18
Update to 2.1.18
action_text-trix RubyGems
- Versions
- 0.0.1
- 2.1.15
- 2.1.16
- 2.1.17
- Affected ranges
- ECOSYSTEM: < 2.1.18
Update to 2.1.18