Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Cure53 | Dompurify | < 3.3.2 |
Related Weaknesses (CWE)
References
- https://github.com/cure53/DOMPurify/security/advisories/GHSA-h8r8-wccr-v5f2ExploitThird Party Advisory
- https://www.vulncheck.com/advisories/dompurify-before-mutation-xss-via-re-contexThird Party Advisory
- https://github.com/cure53/DOMPurify/security/advisories/GHSA-h8r8-wccr-v5f2ExploitThird Party Advisory
FAQ
What is CVE-2026-65914?
CVE-2026-65914 is a vulnerability with a CVSS score of 6.1 (MEDIUM). 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, ...
How severe is CVE-2026-65914?
CVE-2026-65914 has been rated MEDIUM with a CVSS base score of 6.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-65914?
Check the references section above for vendor advisories and patch information. Affected products include: Cure53 Dompurify.