CVE-2026-73427
Description
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 cross-site scripting when a crafted application/x-trix-document JSON payload is dropped into an editor using the fallback Level0InputController, such as an embedded WebView without Input Events Level 2 support. The StringPiece.fromJSON method trusts href attributes from the JSON payload without sanitization, allowing a draggable element containing a javascript: URI to bypass DOMPurify sanitization and inject executable JavaScript into the DOM. Exploitation requires the victim to drag and drop attacker-controlled content, and server-side HTML sanitization can neutralize the payload on save. This issue is fixed in version 2.1.18.
How to fix
- trix2.1.18 or later
- action_text-trix2.1.18 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| trixnpm | v < 2.1.18 | 2.1.18 |
| action_text-trixRubyGems | v < 2.1.18 | 2.1.18 |
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Attack Surface Management
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