[20260517] - Core - Incorrect Cache Key Construction for InputFilter objects

Project: Joomla!
SubProject: CMS
Impact: Low
Severity: Low
Probability: Low
Versions: 4.0.0-5.4.5,6.0.0-6.1.0
Exploit type: Incorrect Cache Key Construction
Reported Date: 2025-11-14
Fixed Date: 2026-05-26
CVE Number: CVE-2026-48901

Description

The InputFilter::getInstance() method omitted a security sensitive parameter from the instance cache key.

Affected Installs

Joomla! CMS versions 4.0.0-5.4.5,6.0.0-6.1.0

Solution

Upgrade to version 5.4.6,6.1.1

Contact

The JSST at the Joomla! Security Centre.

Reported By: ZeroXJacks, Github