Cross-site Scripting (XSS) Affecting ghost package, versions <6.64.0-r0


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.3% (21st percentile)

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  • Snyk IDSNYK-MINIMOSLATEST-GHOST-19829857
  • published16 Sept 2026
  • disclosed1 Sept 2026

Introduced: 1 Sep 2026

CVE-2026-84371  (opens in a new tab)
CWE-79  (opens in a new tab)

How to fix?

Upgrade Minimos:latest ghost to version 6.64.0-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream ghost package and not the ghost package as distributed by Minimos. See How to fix? for Minimos:latest relevant fixed versions and status.

ApostropheCMS is an open-source Node.js content management system, and sanitize-html provides a simple HTML sanitizer with a clear API. From version 1.9.0 until version 2.17.7, packages/sanitize-html/index.js validates an animation value attribute as one flat URL and does not recognize that attributeName selecting href or xlink:href gives the sibling values, from, to, or by attribute SVG SMIL URL semantics. In configurations that allow the animate, animateColor, animateMotion, animateTransform, or set elements, a values list can begin with a safe fragment and contain a later executable destination that survives allowedSchemesAppliedToAttributes checking. When the sanitized SVG is rendered, the browser can copy that later destination into the live link, and a victim who activates the link can execute script in the application's origin. This issue is fixed in version 2.17.7.

CVSS Base Scores

version 3.1