Vulnerability in Phpunit Project
CVE-2026-41570
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.003 (18.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 19th percentile — 18.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001
Affected products
- Phpunit Project — versions 12.5.21, 13.1.5
- Sebastianbergmann Phpunit — versions = 12.5.21, = 13.1.5
Weakness classification (CWE)
References
- github.com/sebastianbergmann/phpunit/security/advisories/GHSA-qrr6-mg7r-m243 (Patch, Mitigation, Vendor Advisory)
- github.com/sebastianbergmann/phpunit/pull/6592 (Patch, Issue Tracking)
Frequently asked questions
- What is CVE-2026-41570?
- CVE-2026-41570 is a high-severity vulnerability in Phpunit Project, classified under Argument Injection. CVSS score: 7.8/10. Published 2026-05-08.
- How severe is CVE-2026-41570?
- High severity. CVSS v3 base score is 7.8 out of 10.