Medium 5.3Published Jul 23, 2026

CVE-2026-65914DOMPurify before 3.3.2 Mutation XSS via Re-Contextualization

Updated under an hour ago (Oct 28, 2026, 1:20 AM ET)

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It affects cure53 DOMPurify. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for cure53 DOMPurify

Exploited in the last 30 days

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.

CVSS: 5.3 MEDIUM (v4.0, CNA)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
Weakness (CWE): CWE-79
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Analyzed
Record last updated: Jul 23, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

cure53 DOMPurify cure53:dompurify (from the name)	before 3.3.2; 3.3.2 not affected	CNA record
cure53 dompurify cure53:dompurify	before 3.3.2	NVD

References

References

https://github.com/cure53/DOMPurify/security/advisories/GHSA-h8r8-wccr-v5f2	vendor-advisory, exploit, third-party-advisory
https://www.vulncheck.com/advisories/dompurify-before-mutation-xss-via-re-contextualization	third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.