CVE-2026-84371

CVE-2026-84371 · ApostropheCMS: Stored XSS via SVG SMIL URI-list scheme-policy bypass

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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 5.4 · Mittel · EPSS 0,3% · Korrektur verfügbar

Veröffentlicht

2026-09-01T20:51:10.441Z

Aktualisiert

2026-09-02T16:02:13.385Z

Technologie-Stack: node

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