CVE-2026-112951
MEDIUM
CVSS 5.4
Published: 2026-10-20
Modified: 2026-10-20
Tenable Plugin
Checking the public Tenable catalog…
Threat Intelligence Pending
IOCs, MITRE ATT&CK techniques, and attack chain data are being generated. Refresh in a few seconds.
Description
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.
Quick Facts
| CVE ID | CVE-2026-112951 |
| CVSS Score | 5.4 |
| Vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N |
| Published | 2026-10-20 |
| Exploited | No |
| CISA KEV | No |
| PoC | Not public |
References
- https://github.com/apostrophecms/apostrophe/commit/06e4b377f…
- https://github.com/apostrophecms/apostrophe/commit/40b989b1a…
- https://github.com/apostrophecms/apostrophe/releases/tag/apo…
- https://github.com/apostrophecms/apostrophe/security/advisor…
- https://github.com/apostrophecms/apostrophe/security/advisor…