CVE-2026-112951
Published:October 20, 2026
Updated:October 21, 2026
ApostropheCMS is an open-source Node.js content management system. Prior to 4.34.0, the color field accepts trailing content after a valid rgb() or hsl() prefix because its TinyColor validation does not require the entire value to match a color. An authenticated user with edit rights can store arbitrary HTML after a valid color prefix. When the stored value is rendered, the payload executes, resulting in stored XSS. This issue is fixed in version 4.34.0.
Affected Packages
https://github.com/apostrophecms/apostrophe.git (GITHUB):
Affected version(s) >=apostrophe@4.26.0 <apostrophe@4.34.0Fix Suggestion:
Update to version apostrophe@4.34.0apostrophe (NPM):
Affected version(s) >=0.3.3 <4.34.0Fix Suggestion:
Update to version 4.34.0@apostrophecms/apostrophe-stable (NPM):
Affected version(s) >=4.31.0 <4.32.1Fix Suggestion:
Update to version 4.32.1apostrophe (NPM):
Affected version(s) >=4.26.0 <4.34.0Fix Suggestion:
Update to version 4.34.0Related Resources (6)
Do you need more information?
Contact UsCVSS v4
Base Score:
5.1
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
PASSIVE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
LOW
Subsequent System Integrity
LOW
Subsequent System Availability
NONE
CVSS v3
Base Score:
5.4
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Weakness Type (CWE)
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
EPSS
Base Score:
0.30