CVE-2026-71573 is a vulnerability in Joomla
Published on August 18, 2026
Joomla! Core - [20260802] - Improper CORS origin validation in Joomla 4.0.0-5.4.7, 6.0.0-6.1.2
Joomla! Core - [20260802] - Improper CORS origin validation in Joomla 4.0.0-5.4.7, 6.0.0-6.1.2 - An improper implementation prevented configured CORS origins from being properly validated in CORS requests.
Vulnerability Analysis
CVE-2026-71573 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 no impact on confidentiality and integrity and availability.
Weakness Type
What is a CRLF Injection Vulnerability?
The software uses CRLF (carriage return line feeds) as a special element, e.g. to separate lines or records, but it does not neutralize or incorrectly neutralizes CRLF sequences from inputs.
CVE-2026-71573 has been classified to as a CRLF Injection vulnerability or weakness.
Products Associated with CVE-2026-71573
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Affected Versions
Joomla! Project Joomla! CMS:- Version 4.0.0-5.4.6 is affected.
- Version 6.0.0-6.1.2 is affected.