{"id":"CVE-2026-90915","title":"Joomla! Core - [20260905] - Core - Arbitrary directory deletion via cache purge action in Joomla 4.0.0-5.4.8, 6.0.0-6.1.3 -An improper validation of the cache group name allowed path traverals in the file storage of the caching layer, re…","summary":"Joomla! Core - [20260905] - Core - Arbitrary directory deletion via cache purge action in Joomla 4.0.0-5.4.8, 6.0.0-6.1.3 -An improper validation of the cache group name allowed path traverals in the file storage of the caching layer, re…","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H","cwe":["CWE-22"],"vendor":"joomla","product":"joomla!","affected":["joomla! >= 4.0.0, < 5.4.8","joomla! >= 6.0.0, < 6.1.3"],"patched":["joomla! 6.1.3"],"published":"2026-09-29","updated":"2026-10-06","sourceUpdated":"2026-10-06T16:33:43.157","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-90915","references":[{"url":"https://developer.joomla.org/security-centre/1085-20260905-core-arbitrary-directory-deletion-via-cache-purge-action.html","label":"security@joomla.org"},{"url":"https://www.joomla.org/","label":"security@joomla.org"}],"tags":["nvd","cve.org"],"epss":0.00345,"epssPercentile":0.27867,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-30T15:06:38.308703Z"},"scores":{"nvd":6.5,"cna":7},"ingestedAt":"2026-09-29T17:41:02.208Z","slug":"CVE-2026-90915","body":"## Overview\n\nJoomla! Core - [20260905] - Core - Arbitrary directory deletion via cache purge action in Joomla 4.0.0-5.4.8, 6.0.0-6.1.3 -An improper validation of the cache group name allowed path traverals in the file storage of the caching layer, resulting in arbitrary directory deletions.\n\n## Affected\n\n- `joomla! >= 4.0.0, < 5.4.8`\n- `joomla! >= 6.0.0, < 6.1.3`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `joomla! 6.1.3`","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":216557,"id":"CVE-2026-90915","ts":1791306616351,"field":"cvss","old":"7","new":"6.5"},{"seq":216556,"id":"CVE-2026-90915","ts":1791306616351,"field":"severity","old":"high","new":"medium"}]}