CVE-2026-0540: DOMPurify contains a Cross-site Scripting vulnerability
(updated )
DOMPurify 3.1.3 through 3.3.1 and 2.5.3 through 2.5.8, fixed in 2.5.9 and 3.3.2, contain a cross-site scripting vulnerability that allows attackers to bypass attribute sanitization by exploiting five missing rawtext elements (noscript, xmp, noembed, noframes, iframe) in the SAFE_FOR_XML regex. Attackers can include payloads like </noscript><img src=x onerror=alert(1)> in attribute values to execute JavaScript when sanitized output is placed inside these unprotected rawtext contexts.
References
- fluidattacks.com/advisories/daft
- github.com/advisories/GHSA-v2wj-7wpq-c8vv
- github.com/cure53/DOMPurify
- github.com/cure53/DOMPurify/commit/302b51de22535cc90235472c52e3401bedd46f80
- github.com/cure53/DOMPurify/commit/fca0a938b4261ddc9c0293a289935a9029c049f5
- github.com/cure53/DOMPurify/releases/tag/3.3.2
- nvd.nist.gov/vuln/detail/CVE-2026-0540
- www.vulncheck.com/advisories/dompurify-xss-via-missing-rawtext-elements-in-safe-for-xml
Code Behaviors & Features
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