Vulnerability in cure53 DOMPurify

[ Description ]Official description

DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. Starting in version 1.0.10 and prior to version 3.4.0, `SAFE_FOR_TEMPLATES` strips `{{...}}` expressions from untrusted HTML. This works in string mode but not with `RETURN_DOM` or `RETURN_DOM_FRAGMENT`, allowing XSS via template-evaluating frameworks like Vue 2. Version 3.4.0 patches the issue.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• BSI CERT-Bund20 Oct 2026WID-SEC-2026-4062

  Oracle Utilities Applications: Multiple vulnerabilities Translated from German

  CVE-2026-49844CVE-2026-41239CVE-2026-68497+5 more CVEs
• CERT-FR2 Oct 2026CERTFR-2026-AVI-1256

  Multiple vulnerabilities in IBM products Translated from French

  Multiple vulnerabilities have been discovered in IBM products. Some of them allow an attacker to cause remote arbitrary code execution, privilege escalation and remote denial of service.

  CVE-2026-27980CVE-2026-58055CVE-2026-49978+360 more CVEs

[ References ]References

• github.com/cure53/DOMPurify/security/advisories/GHSA-crv5-9vww-q3g8x_refsource_CONFIRM
• github.com/cure53/DOMPurify/releases/tag/3.4.0x_refsource_MISC