Incorrect authorization in Joomla! - CVE-2026-90917
Published: September 30, 2026
Vulnerability identifier: #VU152887
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-90917
CWE-ID: CWE-863
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to disclose content items from inaccessible categories.
The vulnerability exists due to improper authorization checks in outputs for tagged items when handling requests for tagged content. A remote attacker can request tagged content to disclose content items from inaccessible categories.
Affected software
Joomla!
How to mitigate CVE-2026-90917
Install security update from vendor's website.
Joomla! - addressed in versions 5.4.9, 6.1.4