CVE-2026-112958
MEDIUM
CVSS 5.4
Published: 2026-10-20
Modified: 2026-10-20
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Description
ApostropheCMS is an open-source Node.js content management system. Prior to 4.34.0, a project-defined free-form widget style field can carry an editor-controlled quote into an inline style attribute because the wrapper serializer does not apply HTML-attribute encoding. The quote can terminate the style attribute and inject executable attributes when published content, or an affected draft viewed by a higher-privileged user, is rendered. This issue is fixed in version 4.34.0.
Quick Facts
| CVE ID | CVE-2026-112958 |
| 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…