{"id":"CVE-2026-84361","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-84361","summary":"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…","details":"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.","published":"2026-09-01T20:06:48.375Z","modified":"2026-09-01T20:06:48.375Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":{"url":"https://github.com/composer/composer/commit/0aac50528e83ed635cf788333635897469440220","label":"composer/composer@0aac505"},"references":[{"type":"WEB","url":"https://github.com/composer/composer/security/advisories/GHSA-rvx4-ffvw-m9q3"},{"type":"WEB","url":"https://github.com/composer/composer/commit/0aac50528e83ed635cf788333635897469440220"},{"type":"WEB","url":"https://github.com/composer/composer/commit/199ad81a9cc6a2a5164ad79a8da26b2e19e521af"},{"type":"WEB","url":"https://github.com/composer/composer/releases/tag/2.10.3"},{"type":"WEB","url":"https://github.com/composer/composer/releases/tag/2.2.30"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-09-01T20:06:48.375Z"}}