Bug 2561481 (CVE-2026-116802) - CVE-2026-116802 dompurify: DOMPurify: Cross-site scripting via attribute sanitization bypass in XHTML mode
Summary: CVE-2026-116802 dompurify: DOMPurify: Cross-site scripting via attribute sani...
Keywords:
Status: NEW
Alias: CVE-2026-116802
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-10-26 23:22 UTC by OSIDB Bzimport
Modified: 2026-10-26 23:32 UTC (History)
0 users

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Description OSIDB Bzimport 2026-10-26 23:22:24 UTC 
DOMPurify before 3.4.17 contains a cross-site scripting vulnerability that allows attackers to bypass the SMIL attributeName=href guard when PARSER_MEDIA_TYPE is application/xhtml+xml, because transformCaseFunc does not lowercase attribute names. Attackers can submit SVG with an animate or set element using attributeName="href" and a javascript: entry in values to execute script when users click the sanitized link.
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