CVE-2026-73427
Published:August 12, 2026
Updated:August 31, 2026
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.
Affected Packages
trix (CDN_JS):
Affected version(s) >=0.9.0 <2.1.18Fix Suggestion:
Update to version 2.1.18https://github.com/basecamp/trix.git (GITHUB):
Affected version(s) >=v2.0.0-alpha.0 <v2.1.18Fix Suggestion:
Update to version v2.1.18trix (NPM):
Affected version(s) >=0.9.0 <2.1.18Fix Suggestion:
Update to version 2.1.18action_text-trix (RUBY):
Affected version(s) >=0.0.1 <2.1.18Fix Suggestion:
Update to version 2.1.18Related Resources (8)
Do you need more information?
Contact UsCVSS v4
Base Score:
2.1
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
PRESENT
Privileges Required
NONE
User Interaction
ACTIVE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
4.3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
NONE
Integrity
LOW
Availability
NONE
Weakness Type (CWE)
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
EPSS
Base Score:
0.33