Is CVE-2026-116804 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-116804?

CVE-2026-116804 has a CVSS v3 severity of MEDIUM (6.1).

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CVE-2026-116804

Description

DOMPurify from 3.4.4 before 3.4.17 contains a SAFE_FOR_TEMPLATES bypass that lets attackers preserve template expressions in attached shadow roots when using RETURN_DOM, RETURN_DOM_FRAGMENT, or IN_PLACE modes. Attackers can split expressions across text nodes separated by disallowed elements, which merge after removal and are evaluated by downstream template engines for cross-site scripting.