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DOMPurify before 3.4.17 XSS via SMIL attributeName Guard Bypass in XHTML Mode

Collected exploitation and prediction evidence

Risk source coverage

CISA KEV is observed exploitation evidence. FIRST EPSS is a dated prediction of exploitation in the next 30 days. Missing scores are unknown. This collector requests predictions only for explicit CVE aliases in the public NuGet archive; Microsoft release views retain their existing prediction scope.

No collected risk observation for these identifiers. This does not establish absence of exploitation or a zero probability.

Dated risk observations

Risk history is separate from CNA/OSV content history. Daily score drift is retained but only an upward crossing of 10% triggers the prediction change event.

Immutable source observations

7 recorded revisions

Each citation identifies one complete source statement. Source modification dates and the time this installation observed them are distinct. Latest history includes records historically associated by source identifiers; a removed alias is not a current equivalence claim. Exact citations show that source record's own earlier observations. Failed reads and unchanged polls do not rewrite history.

30 Oct 2026 02:00:26 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 …

euvd · EUVD-2026-110510 · Published

29 Oct 2026 11:13:09 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 …

nvd · CVE-2026-116802 · Published

28 Oct 2026 00:56:56 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 …

euvd · EUVD-2026-110510 · Published

27 Oct 2026 11:12:01 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 …

nvd · CVE-2026-116802 · Published

27 Oct 2026 11:09:43 UTC

DOMPurify: SMIL attributeName=href guard is skipped when PARSER_MEDIA_TYPE is application/xhtml+xml

osv · GHSA-c6gr-qvv4-5v3f · Published

27 Oct 2026 02:23:01 UTC

DOMPurify before 3.4.17 XSS via SMIL attributeName Guard Bypass in XHTML Mode

cve-program · CVE-2026-116802 · Published

24 Oct 2026 13:17:17 UTC

DOMPurify: SMIL attributeName=href guard is skipped when PARSER_MEDIA_TYPE is application/xhtml+xml

osv · GHSA-c6gr-qvv4-5v3f · Published

ChangeIntel

An IT change radar: releases, security, known issues, retirements, documentation changes, and service status from public sources. Every item links to supporting evidence; dates and statuses can change after they are read.

Sources read 30 Oct 16:58 UTC · 272 of 272 readable · 270 fully read · documentation 469/469 current