Vulnerabilities CVE-2026-65903

CVE-2026-65903

Medium

Open

TLP:CLEAR

DOMPurify before 3.4.0 ADD_TAGS Function Bypasses FORBID_TAGS

NVD CVE.org

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Description

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.

Details

CVSS Score: 5.1
EPSS Score ⓘ: 0.20%

10.2th 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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