CVE-2026-44990
Apostrophe has default XSS via `xmp` raw-text passthrough in `sanitize-html`
CVSS Score
9.3
EPSS Score
0.1%
EPSS Percentile
20th
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.
| CWE | CWE-79 |
| Vendor | apostrophecms |
| Product | sanitize-html |
| Published | Jun 12, 2026 |
Stay Ahead of the Next One
Get instant alerts for apostrophecms sanitize-html
Be the first to know when new critical vulnerabilities affecting apostrophecms sanitize-html are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
None
Affected Versions
apostrophecms / sanitize-html
< 2.17.4