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      <title>CVE-2026-84371 — ApostropheCMS: Stored XSS via SVG SMIL URI-list scheme-policy bypass</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2026-84371</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; apostrophecms apostrophe&lt;/p&gt;
&lt;p&gt;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&amp;#39;s origin. This issue is fixed in version 2.17.7.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; apostrophecms apostrophe&lt;/p&gt;
&lt;p&gt;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&amp;#39;s origin. This issue is fixed in version 2.17.7.&lt;/p&gt;</content:encoded>
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