Vulnerability in Joomla! Project Joomla! CMS

[ Description ]Official description

Joomla! Core - [20260916] - Core - XSS filter bypass in InputFilter via whitespace characters in HTML data URIs in Joomla 1.5.0-5.4.8, 6.0.0-6.1.3 - The cleanAttribute method removes HTML data URIs, however injected whitespaces characters could circumvent that cleanup, causing an XSS vector.

[ Fixes ]Fixes and patches

• Patch on developer.joomla.orgVendor patch or bulletin · NVD · Reference tagged 'Patch' by NVD

[ Advisories ]Government CERT advisories

• BSI CERT-Bund29 Sep 2026WID-SEC-2026-3636

  Joomla: Multiple vulnerabilities Translated from German

  CVE-2026-92227CVE-2026-90914CVE-2026-90913+13 more CVEs

[ References ]References

• developer.joomla.org/security-centre/1096-20260916-core-xss-filter-bypass-in-inputfilte…PatchVendor Advisory
• www.joomla.orgProduct