Medium severity · published Jul 23, 2026
CVE-2026-65912
DOMPurify before 3.3.2 URI Validation Bypass via ADD_ATTR
6.1
CVSS
0.3%
EPSS
No
On KEV
Description
DOMPurify before 3.3.2 contains a URI validation bypass vulnerability when ADD_ATTR is provided as a predicate function via EXTRA_ELEMENT_HANDLING.attributeCheck. Attackers can supply a predicate that accepts specific attribute and tag combinations to bypass URI-safe validation, allowing unsafe protocols like javascript: to survive sanitization and execute as DOM-based XSS when the link is activated.
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-2026-65912
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-65912
Third Party Advisory
https://github.com/cure53/DOMPurify/security/advisories/GHSA-cjmm-f4jc-qw8r
Third Party Advisory
https://www.vulncheck.com/advisories/dompurify-before-uri-validation-bypass-via-add-attr
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