CVE-2026-65912

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 4.0

5.1CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

CVSS 3.1

6.1CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS

0.3% chance of exploitation in the next 30 days; higher than 22% of CVEs (scores of 2026-10-25)

CWE

CWE-79

Published

2026-07-23

Modified

2026-10-24

Record from

the NVD, synced 2026-10-24

Affected

• cure53:dompurify

Packages (OSV)

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

Check your stackJSON