Description
PHPUnit is a testing framework for PHP. From 13.4.0 until 13.4.4, the TestCase::coverageFilesDirectory() logic in src/Runner/Phpt/TestCase.php creates temporary files for PHPT code coverage in a predictable phpunit-phpt directory under sys_get_temp_dir() and reuses that directory without verifying its ownership or permissions. On multi-user systems with a shared temporary path, a local attacker who creates the directory before the developer runs PHPT tests with code coverage can replace the generated job file before the child process executes it with require, allowing arbitrary code execution with the developer's privileges while the test and coverage report appear successful. PHPUnit 12.5 and earlier, default macOS and Windows configurations with per-user temporary directories, and single-user environments where another user cannot create files in the temporary path are not affected. This issue is fixed in 13.4.4.
Published: 2026-10-29
Score: 5.4 Medium
EPSS: n/a
KEV: No
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History

Thu, 29 Oct 2026 20:45:00 +0000

Type Values Removed Values Added
First Time appeared Sebastianbergmann
Sebastianbergmann phpunit
Vendors & Products Sebastianbergmann
Sebastianbergmann phpunit

Thu, 29 Oct 2026 19:45:00 +0000

Type Values Removed Values Added
Description PHPUnit is a testing framework for PHP. From 13.4.0 until 13.4.4, the TestCase::coverageFilesDirectory() logic in src/Runner/Phpt/TestCase.php creates temporary files for PHPT code coverage in a predictable phpunit-phpt directory under sys_get_temp_dir() and reuses that directory without verifying its ownership or permissions. On multi-user systems with a shared temporary path, a local attacker who creates the directory before the developer runs PHPT tests with code coverage can replace the generated job file before the child process executes it with require, allowing arbitrary code execution with the developer's privileges while the test and coverage report appear successful. PHPUnit 12.5 and earlier, default macOS and Windows configurations with per-user temporary directories, and single-user environments where another user cannot create files in the temporary path are not affected. This issue is fixed in 13.4.4.
Title PHPUnit vulnerable to code execution by other local users via shared temporary directory in PHPT code coverage handling
Weaknesses CWE-379
References
Metrics cvssV4_0

{'score': 5.4, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}


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Sebastianbergmann Phpunit
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-10-29T19:35:36.052Z

Reserved: 2026-10-29T16:04:48.728Z

Link: CVE-2026-119193

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-29T20:17:30.340

Modified: 2026-10-29T20:17:30.340

Link: CVE-2026-119193

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-29T20:45:14Z

Weaknesses
  • CWE-379

    Creation of Temporary File in Directory with Insecure Permissions