CVE-2026-44990
Critical
Description
ApostropheCMS is an open-source Node.js content management system, and sanitize-html provides a simple HTML sanitizer with a clear API. Under the default configuration, versions of `sanitize-html` prior to 2.17.4 can turn attacker-controlled content inside a disallowed `xmp` element into live HTML or JavaScript. This is a sanitizer bypass in the default `disallowedTagsMode: 'discard'` path and can lead to stored XSS in applications that render sanitized output back to users. Version 2.17.4 patches the issue.
SeverityCritical
CVSS9.3
Exploit probability—
ProductSanitize-html
PublishedJun 12, 2026
First seenJun 12, 2026
Weakness typeCWE-79Cross-site scripting (XSS)
How to fix
Update
- sanitize-html2.17.4 or later
Vendor advisories
- access.redhat.com/errata/RHSA-2026:41064
- access.redhat.com/errata/RHSA-2026:47737
- access.redhat.com/errata/RHSA-2026:36882
- access.redhat.com/errata/RHSA-2026:46903
- access.redhat.com/errata/RHSA-2026:57191
- access.redhat.com/errata/RHSA-2026:60386
- access.redhat.com/errata/RHSA-2026:46685
- access.redhat.com/errata/RHSA-2026:46598
- access.redhat.com/errata/RHSA-2026:63103
- access.redhat.com/errata/RHSA-2026:63046
- access.redhat.com/errata/RHSA-2026:60441
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| sanitize-htmlnpm | 2.17.3 ≤ v < 2.17.4 | 2.17.4 |
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