CVE-2026-116804

CVSS 6.1 (medium) · published 2026-10-27

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.

Weakness: CWE-79

Source: NVD CVE-2026-116804

References

• https://github.com/cure53/DOMPurify/security/advisories/GHSA-cg2g-xh64-v4q7
• https://www.vulncheck.com/advisories/dompurify-from-3.4.4-before-3.4.17-safe-for-templates-bypass-via-shadow-root-content
• https://github.com/cure53/DOMPurify/security/advisories/GHSA-cg2g-xh64-v4q7

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