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Vulnerabilities CVE-2026-65914

CVE-2026-65914

Medium
Open
TLP:CLEAR

DOMPurify before 3.3.2 Mutation XSS via Re-Contextualization

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Description

DOMPurify before 3.3.2 contains a mutation-XSS vulnerability when sanitized HTML is reinserted into special parsing contexts using innerHTML with wrappers like script, xmp, iframe, noembed, noframes, or noscript. Attackers can craft payloads with closing sequences that break out of the wrapper context during reparsing, reactivating dangerous markup with event handlers to execute JavaScript.

Details

CVSS Score
5.3
EPSS Score
0.17%

6.3th percentile

CVSS Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
Confidence
90%
Published
Jul 23, 2026
Last Modified
Jul 23, 2026
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