CVE-2026-73427

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.

CVSS

No CVSS.

References

Link	Resource
https://github.com/basecamp/trix/commit/9c0a993d9fc2ffe9d56b013b030bc238f9c0557c
https://github.com/basecamp/trix/pull/1293
https://github.com/basecamp/trix/releases/tag/v2.1.18
https://github.com/basecamp/trix/security/advisories/GHSA-53p3-c7vp-4mcc

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-12 21:17

Updated : 2026-09-09 21:02

NVD link : CVE-2026-73427

Mitre link : CVE-2026-73427

CVE.ORG link : CVE-2026-73427

JSON object : View

Products Affected

No product.

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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