CVE-2026-65912

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

References

• https://github.com/cure53/DOMPurify/security/advisories/GHSA-cjmm-f4jc-qw8r
• https://www.vulncheck.com/advisories/dompurify-before-uri-validation-bypass-via-add-attr