{"id":"CVE-2026-59946","aliases":["BIT-composer-2026-59946","GHSA-gjfg-22fp-rrxx"],"url":"https://o3.security/vulnerability/CVE-2026-59946","summary":"Composer: Path traversal in package bin field lets dependencies chmod arbitrary host files","details":"Composer is a dependency Manager for the PHP language. Prior to 2.2.29 and 2.10.2, a Composer package bin entry containing .. path segments can resolve outside the package install directory and cause Composer's binary installation flow to chmod an existing host file to a world-readable and world-executable mode during composer install, update, or require. This issue is fixed in versions 2.2.29 and 2.10.2.","published":"2026-07-08T19:32:38.089Z","modified":"2026-08-14T18:51:33.929425424Z","cvss":{"score":6.1,"severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N"},"epss":{"score":0.00172,"percentile":0.06785,"asOf":"2026-09-04"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Packagist","name":"composer/composer","fixedVersion":"2.10.2"},{"ecosystem":"Packagist","name":"composer/composer","fixedVersion":"2.2.29"}],"fix":{"url":"https://github.com/composer/composer/commit/502c6c4f699802d9cf464728b3e8a95674f919a0","label":"composer/composer@502c6c4"},"references":[{"type":"WEB","url":"https://github.com/composer/composer/releases/tag/2.10.2"},{"type":"WEB","url":"https://github.com/composer/composer/releases/tag/2.2.29"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/59xxx/CVE-2026-59946.json"},{"type":"ADVISORY","url":"https://github.com/composer/composer/security/advisories/GHSA-gjfg-22fp-rrxx"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-59946"},{"type":"FIX","url":"https://github.com/composer/composer/commit/502c6c4f699802d9cf464728b3e8a95674f919a0"},{"type":"FIX","url":"https://github.com/composer/composer/commit/c50b1efd13ebd73f6dca19b31424c5a02bf93cc1"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-14T18:51:33.929425424Z"}}