Expression Language Injection Affecting cockpit-image-builder package, versions *


Severity

Recommended
0.0
medium
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.18% (8th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-RHEL10-COCKPITIMAGEBUILDER-18761343
  • published14 Aug 2026
  • disclosed23 Jul 2026

Introduced: 23 Jul 2026

NewCVE-2026-65900  (opens in a new tab)
CWE-917  (opens in a new tab)

How to fix?

There is no fixed version for RHEL:10 cockpit-image-builder.

NVD Description

Note: Versions mentioned in the description apply only to the upstream cockpit-image-builder package and not the cockpit-image-builder package as distributed by RHEL. See How to fix? for RHEL:10 relevant fixed versions and status.

DOMPurify versions >=3.0.0 and before 3.4.8, when configured with SAFE_FOR_TEMPLATES together with a DOM output mode (RETURN_DOM, RETURN_DOM_FRAGMENT, or IN_PLACE), fail to strip template expressions (e.g. ${evil}, {{evil}}, <%evil%>) inside <template> element content. The final normalization/scrub pass (_scrubTemplateExpressions) uses a NodeIterator and node.normalize() that do not descend into template.content, so expressions that only form after adjacent text nodes merge survive sanitization. This bypasses SAFE_FOR_TEMPLATES and can allow a downstream template engine to evaluate attacker-supplied expressions. The string output path is not affected.

CVSS Base Scores

version 3.1