CVE-2026-65903
DOMPurify before 3.4.0 ADD_TAGS Function Bypasses FORBID_TAGS
CVSS Score
6.1
EPSS Score
0.0%
EPSS Percentile
0th
DOMPurify before 3.4.0 contains a logic error in the ADD_TAGS function where short-circuit evaluation allows forbidden tags to bypass FORBID_TAGS restrictions. Attackers can craft input containing tags listed in FORBID_TAGS that are also added via ADD_TAGS function, causing them to be retained in sanitized output.
| CWE | CWE-697 |
| Vendor | cure53 |
| Product | dompurify |
| Published | Jul 23, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None
Affected Versions
cure53 / DOMPurify
0 < 3.4.0