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Vulnerabilities CVE-2026-65912

CVE-2026-65912

Medium
Open
TLP:CLEAR

DOMPurify before 3.3.2 URI Validation Bypass via ADD_ATTR

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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.

Details

CVSS Score
5.1
EPSS Score
0.18%

7.2th percentile

CVSS Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/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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