CVE-2026-65912
5.1
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
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| cure53 | DOMPurify | 0 < 3.3.2 | affected |
| cure53 | DOMPurify | 3.3.2 | unaffected |
Weaknesses
- CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: no
- Technical Impact: partial
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
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