{"id":"CVE-2026-59948","summary":"Composer: Arbitrary file write outside vendor via malicious transitive package name","details":"Composer is a dependency Manager for the PHP language. Prior to 2.2.29 and 2.10.2, a maliciously crafted package from an untrusted repository other than Packagist.org or Private Packagist can cause Composer to write attacker-controlled files outside the vendor directory and outside the project during install or update by using an invalid package name that is not correctly validated before dependency-resolution results are written or installed. This issue is fixed in versions 2.2.29 and 2.10.2.","aliases":["BIT-composer-2026-59948","GHSA-499r-g7pc-vmp9"],"modified":"2026-08-07T11:51:35.750228713Z","published":"2026-07-08T19:33:48.414Z","related":["SUSE-SU-2026:3105-1","openSUSE-SU-2026:11268-1","openSUSE-SU-2026:21520-1"],"database_specific":{"cwe_ids":["CWE-22","CWE-787"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/59xxx/CVE-2026-59948.json","cna_assigner":"GitHub_M"},"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-2026-59948.json"},{"type":"ADVISORY","url":"https://github.com/composer/composer/security/advisories/GHSA-499r-g7pc-vmp9"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-59948"},{"type":"FIX","url":"https://github.com/composer/composer/commit/502c6c4f699802d9cf464728b3e8a95674f919a0"},{"type":"FIX","url":"https://github.com/composer/composer/commit/c50b1efd13ebd73f6dca19b31424c5a02bf93cc1"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/composer/composer","events":[{"introduced":"32df3aa8cdbdaa16df9491b5e672e81c87f94c78"},{"introduced":"934ee6eed3c3ffd0aeccef7c1d255adcf0752b24"},{"fixed":"ccbe57917efe30262ce80463fc4a6182c5ac29ed"},{"fixed":"8d4439f572a97670a9edc039eb3b093cc976b4bc"},{"fixed":"502c6c4f699802d9cf464728b3e8a95674f919a0"},{"fixed":"c50b1efd13ebd73f6dca19b31424c5a02bf93cc1"}],"database_specific":{"source":["AFFECTED_FIELD","REFERENCES"],"extracted_events":[{"introduced":"1.0"},{"fixed":"2.2.29"},{"introduced":"2.3.0"},{"fixed":"2.10.2"}]}}],"versions":["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-2026-59948.json"}}],"schema_version":"1.8.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H"}]}