Bug 2527092 (CVE-2026-84371) - CVE-2026-84371 sanitize-html: stored XSS via SVG SMIL URI-list scheme-policy bypass
Summary: CVE-2026-84371 sanitize-html: stored XSS via SVG SMIL URI-list scheme-policy ...
Keywords:
Status: NEW
Alias: CVE-2026-84371
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2527486 2527487 2527488 2527489 2527491 2527495 2527496 2527498 2527499 2527500 2527503 2527504 2527506 2527508 2527509 2527511
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-01 21:02 UTC by OSIDB Bzimport
Modified: 2026-09-02 15:03 UTC (History)
44 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-09-01 21:02:01 UTC
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.


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