CVE-2026-116804

5.1 medium

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.

CVSS 4.0: 5.1CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
CVSS 3.1: 6.1CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CWE: CWE-79
Published: 2026-10-26
Modified: 2026-10-26
Record from: the CVE List, synced 2026-10-26

Affected

cure53:dompurify

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

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