CVE-2026-44990

high

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.

References

https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44990.json

https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-rpr9-rxv7-x643

https://bugzilla.redhat.com/show_bug.cgi?id=2488565

https://access.redhat.com/security/cve/CVE-2026-44990

Details

Source: Mitre, NVD

Published: 2026-06-12

Updated: 2026-06-30

Risk Information

CVSS v2

Base Score: 9.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:N

Severity: High

CVSS v3

Base Score: 8.1

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

Severity: High

EPSS

EPSS: 0.00064