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DOMPurify Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') Vuln (CVE-2026-109344) - Vulnerability Database

DOMPurify Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') Vuln (CVE-2026-109344)

Description

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.

References

CVE-2026-109344

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Severity

Medium

Classification

CVE-2026-109344
CWE-707
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Tags

Missing Update
Known Vulnerabilities