CVE-2026-0540: CURE53 Dompurify

Medium severity, CVSS 6.1. EPSS: 0.3% chance of exploitation in the next 30 days.

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.

Affected products

• CURE53 Dompurify: from 2.5.3, up to and including 2.5.8; from 3.1.3, up to and including 3.3.1

Published 2026-03-03. Last modified 2026-06-17.