CVE-2026-0540

Medium

Description

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.

SeverityMedium

CVSS6.1

Exploit probability—

ProductCure53 Dompurify

PublishedMar 3, 2026

First seenMar 3, 2026

Weakness typeCWE-79Cross-site scripting (XSS)

How to fix

Update

dompurify3.3.2, 2.5.9 or later

Patches

github.com/cure53/DOMPurify/commit/302b51de22535cc90235472c52e3401bedd46f80

Vendor advisories

github.com/cure53/DOMPurify/releases/tag/3.3.2

Affected products

Product	Affected versions	Fixed in
cure53 dompurify	2.5.3 ≤ v ≤ 2.5.8, 3.1.3 ≤ v ≤ 3.3.1	—
dompurifynpm	3.1.3 ≤ v < 3.3.2, 2.5.3 ≤ v < 2.5.9	3.3.2, 2.5.9

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