CVE-2025-66400 Affecting drupal-11.3 package, versions <11.3.13-r3


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.3% (23rd percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-DRUPAL113-17800202
  • published2 Jul 2026
  • disclosed1 Dec 2025

Introduced: 1 Dec 2025

CVE-2025-66400  (opens in a new tab)

How to fix?

Upgrade Chainguard drupal-11.3 to version 11.3.13-r3 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream drupal-11.3 package and not the drupal-11.3 package as distributed by Chainguard. See How to fix? for Chainguard relevant fixed versions and status.

mdast-util-to-hast is an mdast utility to transform to hast. From 13.0.0 to before 13.2.1, multiple (unprefixed) classnames could be added in markdown source by using character references. This could make rendered user supplied markdown code elements appear like the rest of the page. This vulnerability is fixed in 13.2.1.

CVSS Base Scores

version 3.1