Medium severity · published Jul 23, 2026
CVE-2026-65914
DOMPurify before 3.3.2 Mutation XSS via Re-Contextualization
6.1
CVSS
0.3%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 23% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DO
DOMPurify · cure53
before 3.3.2 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-65914
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-65914
Exploit
https://github.com/cure53/DOMPurify/security/advisories/GHSA-h8r8-wccr-v5f2
Third Party Advisory
https://www.vulncheck.com/advisories/dompurify-before-mutation-xss-via-re-contextualization
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