CVE-2026-84361
Description
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.
How to fix
- composer/composer2.10.3, 2.2.30 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| composer/composerPackagist | 2.3.0 ≤ v < 2.10.3, 1.0 ≤ v < 2.2.30 | 2.10.3, 2.2.30 |
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