CVE-2026-90915
HighCVSS 7.0Summary
Joomla! Core versions 4.0.0-5.4.8 and 6.0.0-6.1.3 have an arbitrary directory deletion vulnerability via the cache purge action. An improper validation of the cache group name allowed path traversals in the file storage of the caching layer, resulting in arbitrary directory deletions.
Risk Assessment
An attacker can delete arbitrary directories on the server, potentially leading to data loss, application disruption, or full system compromise.
Recommendation
Upgrade Joomla! to a patched version. Also restrict access to cache purge functionality and monitor filesystem permissions.
Other vulnerabilities in Joomla!
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- CVE-2026-92231High
Joomla! Core versions 1.5.0-5.4.8 and 6.0.0-6.1.3 have an XSS filter bypass in InputFilter due to an HTML5 entity decode mismatch. The checkAttribute method normalizes an attribute value before testing it against the "javascript:" scheme regex, but without decoding HTML5 entities beforehand, causing an XSS vector.
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Joomla! Core versions 4.0.0-5.4.8 and 6.0.0-6.1.3 have SSRF vectors in various core extensions. URLs used for serverside requests were improperly validated, leading to SSRF vectors.
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SQL injection vulnerability in Joomla! 3.x before 3.4.7 allows attackers to execute arbitrary SQL commands via unspecified vectors.
Original NVD description (English source)
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, resulting in arbitrary directory deletions.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS