CVE-2026-112958
Medium
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.
SeverityMedium
CVSS5.4
Exploit probability—
ProductApostrophe
PublishedOct 20, 2026
First seenOct 20, 2026
Weakness typeCWE-79Cross-site scripting (XSS)
How to fix
Update
- apostrophe4.34.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| apostrophenpm | v < 4.34.0 | 4.34.0 |
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