CVE-2026-41570

CVE-2026-41570 · PHPUnit: Argument injection via newline in PHP INI values forwarded to child processes

This page contains facts from public vulnerability sources. Check the original advisory before updating.

PHPUnit is a testing framework for PHP. In versions 12.5.21 and 13.1.5, PHPUnit forwards PHP INI settings to child processes (used for isolated/PHPT test execution) as -d name=value command-line arguments without neutralizing INI metacharacters. Because PHP's INI parser interprets " as a string delimiter, ; as the start of a comment, and most importantly a newline as a directive separator, a value containing a newline is parsed by the child process as multiple INI directives. An attacker able to influence a single INI value can therefore inject arbitrary additional directives into the child's configuration, including auto_prepend_file, extension, disable_functions, open_basedir, and others. Setting auto_prepend_file to an attacker-controlled path yields remote code execution in the child process. This issue has been patched in versions 12.5.22 and 13.1.6.

CVSS 7.8 · High · EPSS 0.2% · Fix available

Published

2026-05-08T14:33:51.630Z

Updated

2026-05-08T16:01:51.929Z

Stack: system · php

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