{"id":"CVE-2026-84361","summary":"Composer: Perforce source URL permits P4PORT `rsh:` command execution","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.","aliases":["GHSA-rvx4-ffvw-m9q3"],"modified":"2026-09-03T03:48:20.034402432Z","published":"2026-09-01T20:06:48.375Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-78"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/84xxx/CVE-2026-84361.json"},"references":[{"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"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/84xxx/CVE-2026-84361.json"},{"type":"ADVISORY","url":"https://github.com/composer/composer/security/advisories/GHSA-rvx4-ffvw-m9q3"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-84361"},{"type":"FIX","url":"https://github.com/composer/composer/commit/0aac50528e83ed635cf788333635897469440220"},{"type":"FIX","url":"https://github.com/composer/composer/commit/199ad81a9cc6a2a5164ad79a8da26b2e19e521af"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/composer/composer","events":[{"introduced":"32df3aa8cdbdaa16df9491b5e672e81c87f94c78"},{"introduced":"934ee6eed3c3ffd0aeccef7c1d255adcf0752b24"},{"fixed":"dcf399dbf5a5d05b54169fe2caf018152edba181"},{"fixed":"f0de0bf90226853b841672f086d8b58b02332504"},{"fixed":"0aac50528e83ed635cf788333635897469440220"},{"fixed":"199ad81a9cc6a2a5164ad79a8da26b2e19e521af"}],"database_specific":{"source":["AFFECTED_FIELD","REFERENCES"],"extracted_events":[{"introduced":"1.0"},{"fixed":"2.2.30"},{"introduced":"2.3.0"},{"fixed":"2.10.3"}]}}],"versions":["2.10.2","2.10.1","2.10.0","2.10.0-RC2","2.10.0-RC1","2.9.5","2.9.4","2.9.3","2.9.2","2.9.1","2.9.0","2.9.0-RC1","2.8.9","2.8.8","2.8.7","2.8.6","2.8.5","2.8.4","2.8.3","2.8.2","2.8.1","2.8.0","2.7.9","2.7.8","2.7.7","2.7.6","2.7.5","2.7.4","2.7.3","2.7.2","2.7.1","2.7.0","2.6.5","2.6.4","2.6.3","2.6.2","2.6.1","2.6.0","2.5.2","2.5.1","2.5.0","2.4.1","2.4.0","2.4.0-RC1","2.3.5","2.3.4","2.3.3","2.3.2","2.3.1","2.3.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-84361.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"}]}