CVE-2026-0540

DOMPurify 3.1.3 through 3.3.1 and 2.5.3 through 2.5.8, fixed in commit 2726c74, 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.

Score

CVSS 3.1 6.1 Medium

Status

Modified - help@fluidattacks.com

Published

2026-03-03

Last modified

2026-03-25

Weaknesses

CWE-79

Affected products

• Dompurify (Cure53)

References

• https://fluidattacks.com/advisories/daft
• https://github.com/cure53/DOMPurify
• https://github.com/cure53/DOMPurify/commit/302b51de22535cc90235472c52e3401bedd46f80
• https://github.com/cure53/DOMPurify/releases/tag/3.3.2
• https://www.vulncheck.com/advisories/dompurify-xss-via-missing-rawtext-elements-in-safe-for-xml