CVE-2026-90915 Path traversal in Joomla! CMS
Attackers can delete arbitrary directories via path traversal in the cache purge action, requiring a patch to prevent data loss.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-90915?
CVE-2026-90915 is a high-severity path traversal vulnerability in Joomla Joomla\!, published on 29 Sep 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
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.
Weakness: CWE-22
Which versions are affected by CVE-2026-90915?
1 open source package ship an affected version, including joomla. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
joomla Bitnami | From 4.0.0 | 5.4.8, 6.1.3 |
Products include Joomla Joomla\!.
How do I fix CVE-2026-90915?
Upgrade joomla to a fixed version for your release line: 5.4.8 or 6.1.3.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-90915 being exploited?
There is no known exploitation of CVE-2026-90915 in the wild and no public exploit code.
Other vulnerabilities in Joomla Joomla\!
- CVE-2016-10033 PHPMailer Command Injection
- CVE-2023-23752 Joomla! Improper Access Control
- CVE-2026-48902 Joomla! Core - [20260518] - Transport encryption downgrade for password and username reset links
- CVE-2025-25226 [20250401] - Joomla Framework - SQL injection vulnerability in quoteNameStr method of Database package
- CVE-2022-23795 [20220303] - Core - User row are not bound to a authentication mechanism
Sources
Also known as BIT-joomla-2026-90915, GHSA-fgrv-mjcr-vg2p.