CVE-2026-48901 Joomla! Core - [20260517] - Incorrect Cache Key Construction for InputFilter objects
Attackers can bypass input filtering by exploiting incorrect cache key construction in Joomla's InputFilter, potentially allowing malicious data injection.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-48901?
CVE-2026-48901 is a high-severity vulnerability in Joomla Joomla\!, published on 26 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The InputFilter::getInstance() method omitted a security sensitive parameter from the instance cache key.
Weakness: CWE-524
Which versions are affected by CVE-2026-48901?
1 open source package ship an affected version, including joomla. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
joomla Bitnami | From 4.0.0 | 5.4.6, 6.1.1 |
Products include Joomla Joomla\!.
How do I fix CVE-2026-48901?
Upgrade joomla to a fixed version for your release line: 5.4.6 or 6.1.1.
Is CVE-2026-48901 being exploited?
There is no known exploitation of CVE-2026-48901 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-2026-48901, GHSA-phf8-w34q-995j.