Path traversal in Joomla! - CVE-2026-90915
Published: September 30, 2026
Vulnerability identifier: #VU152889
CSH Severity: High
CVSS v4: 8.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-90915
CWE-ID: CWE-22
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to delete arbitrary directories.
The vulnerability exists due to improper validation of cache group names in the cache layer file storage when processing cache purge actions. A remote attacker can submit a cache group name containing path traversal sequences to delete arbitrary directories.
Affected software
Joomla!
How to mitigate CVE-2026-90915
Install security update from vendor's website.
Joomla! - addressed in versions 5.4.9, 6.1.4