CVE-2026-109344

CVSS 6.1 (medium) · published 2026-10-12

DOMPurify from 3.4.13 before 3.4.16 contains a cross-site scripting vulnerability because IN_PLACE mode fails to neutralize subtrees detached by afterSanitizeElements or afterSanitizeAttributes hooks. Attackers can supply markup with on* handlers inside a wrapper removed by such hooks, leaving handlers armed on the live DOM to execute script in the victim origin.

Weakness: CWE-79

Source: NVD CVE-2026-109344

References

• https://github.com/cure53/DOMPurify/security/advisories/GHSA-p98j-92pf-mc4p
• https://www.vulncheck.com/advisories/dompurify-from-3.4.13-before-3.4.16-dom-xss-via-in-place-aftersanitize-hooks

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