CVE-2026-84361

Composer is a dependency Manager for the PHP language. From 1.0 until 2.2.30 and 2.10.3, a malicious dependency package from a custom Composer repository or an untrusted composer.lock file could set source.type to perforce and source.url to an rsh: or jsh: P4PORT value. When the Perforce p4 client was installed and Composer installed the package from source through composer install or composer update, including --prefer-source, Composer\Util\Perforce passed the address to p4 without validation, causing p4 to run a local command with the privileges of the user or CI account. Packagist.org does not permit Perforce source metadata. This issue is fixed in versions 2.2.30 and 2.10.3.

CVSS

No CVSS.

References

Link	Resource
https://github.com/composer/composer/commit/0aac50528e83ed635cf788333635897469440220
https://github.com/composer/composer/commit/199ad81a9cc6a2a5164ad79a8da26b2e19e521af
https://github.com/composer/composer/releases/tag/2.10.3
https://github.com/composer/composer/releases/tag/2.2.30
https://github.com/composer/composer/security/advisories/GHSA-rvx4-ffvw-m9q3

Configurations

No configuration.

History

No history.

Information

Published : 2026-09-01 21:18

Updated : 2026-09-09 21:09

NVD link : CVE-2026-84361

Mitre link : CVE-2026-84361

CVE.ORG link : CVE-2026-84361

JSON object : View

Products Affected

No product.

CWE

CWE-78

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

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