Is CVE-2026-116803 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-116803?

CVE-2026-116803 has a CVSS v3 severity of MEDIUM (6.1).

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CVE-2026-116803

Description

DOMPurify before 3.4.17 contains a cross-site scripting vulnerability that allows attackers to keep event handlers armed when an IN_PLACE hook removes a parent or sibling node. Attacker markup in detached subtrees is never walked or neutralized, so handlers like img onerror fire after sanitize() returns, causing DOM XSS.