Joomla InputFilter Cache Key Bypass in Input Filtering
CVE-2026-48901 Published on May 26, 2026
Joomla! Core - [20260517] - Incorrect Cache Key Construction for InputFilter objects
The InputFilter::getInstance() method omitted a security sensitive parameter from the instance cache key.
Vulnerability Analysis
CVE-2026-48901 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a high impact on confidentiality, with no impact on integrity and availability.
Weakness Type
Use of Cache Containing Sensitive Information
The code uses a cache that contains sensitive information, but the cache can be read by an actor outside of the intended control sphere. Applications may use caches to improve efficiency when communicating with remote entities or performing intensive calculations. A cache maintains a pool of objects, threads, connections, pages, financial data, passwords, or other resources to minimize the time it takes to initialize and access these resources. If the cache is accessible to unauthorized actors, attackers can read the cache and obtain this sensitive information.
Products Associated with CVE-2026-48901
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Affected Versions
Joomla! Project Joomla! CMS:- Version 4.0.0-5.4.5 is affected.
- Version 6.0.0-6.1.0 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.