CVE-2026-41570

Description

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.

Weakness classification

• security-advisories@github.com: CWE-88

Primary references

• security-advisories@github.com — Issue Tracking, Patch
• security-advisories@github.com — Mitigation, Patch, Vendor Advisory
• 134c704f-9b21-4f2e-91b3-4a467353bcc0 — Issue Tracking, Patch