CVE-2026-23898 Joomla! Core - [20260305] - Arbitrary file deletion in com_joomlaupdate
Attackers can delete arbitrary files via the autoupdate mechanism due to lack of input validation, impacting Joomla CMS integrity.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-23898?
CVE-2026-23898 is a high-severity path traversal vulnerability in Joomla Joomla\!, published on 1 Apr 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
Lack of input validation leads to an arbitrary file deletion vulnerability in the autoupdate server mechanism.
Weakness: CWE-73
Which versions are affected by CVE-2026-23898?
1 open source package ship an affected version, including joomla. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
joomla Bitnami | From 3.0.0 | 5.4.4, 6.0.4 |
Products include Joomla Joomla\!.
How do I fix CVE-2026-23898?
Upgrade joomla to a fixed version for your release line: 5.4.4 or 6.0.4.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-23898 being exploited?
There is no known exploitation of CVE-2026-23898 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-2026-23898, GHSA-m9qp-xh66-cmcx.