Is CVE-2026-109345 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-109345?

CVE-2026-109345 has a CVSS v3 severity of MEDIUM (6.1).

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CVE-2026-109345

Description

DOMPurify before 3.4.16 contains a cross-site scripting vulnerability that allows attackers to bypass sanitization because IN_PLACE mode returns a force-removed style element whose text content still carries markup. Attackers can supply a style element containing a closing style tag and an img onerror payload, which executes script when the application serializes and re-parses the returned node.