{"id":"CVE-2026-59948","state":"PUBLISHED","title":"Composer: Arbitrary file write outside vendor via malicious transitive package name","description":"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.","publishedAt":"2026-07-08T19:33:48.414Z","updatedAt":"2026-07-09T14:32:07.719Z","severity":{"score":7,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","source":"GitHub_M"},"assigner":"GitHub_M","products":["composer composer"],"affected":[{"vendor":"composer","product":"composer","versions":[{"version":">= 1.0, < 2.2.29","status":"affected"},{"version":">= 2.3.0, < 2.10.2","status":"affected"}]}],"references":["https://github.com/composer/composer/security/advisories/GHSA-499r-g7pc-vmp9","https://github.com/composer/composer/commit/502c6c4f699802d9cf464728b3e8a95674f919a0","https://github.com/composer/composer/commit/c50b1efd13ebd73f6dca19b31424c5a02bf93cc1","https://github.com/composer/composer/releases/tag/2.10.2","https://github.com/composer/composer/releases/tag/2.2.29"],"weaknesses":["CWE-22","CWE-787"],"ingestedAt":"2026-10-29T20:12:32.778Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/59xxx/CVE-2026-59948.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-59948","state":"PUBLISHED","datePublished":"2026-07-08T19:33:48.414Z","dateUpdated":"2026-07-09T14:32:07.719Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-07-07T18:49:15.607Z"},"containers":{"cna":{"title":"Composer: Arbitrary file write outside vendor via malicious transitive package name","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"composer","product":"composer","versions":[{"version":">= 1.0, < 2.2.29","status":"affected"},{"version":">= 2.3.0, < 2.10.2","status":"affected"}]}],"references":[{"url":"https://github.com/composer/composer/security/advisories/GHSA-499r-g7pc-vmp9","name":"https://github.com/composer/composer/security/advisories/GHSA-499r-g7pc-vmp9","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/composer/composer/commit/502c6c4f699802d9cf464728b3e8a95674f919a0","name":"https://github.com/composer/composer/commit/502c6c4f699802d9cf464728b3e8a95674f919a0","tags":["x_refsource_MISC"]},{"url":"https://github.com/composer/composer/commit/c50b1efd13ebd73f6dca19b31424c5a02bf93cc1","name":"https://github.com/composer/composer/commit/c50b1efd13ebd73f6dca19b31424c5a02bf93cc1","tags":["x_refsource_MISC"]},{"url":"https://github.com/composer/composer/releases/tag/2.10.2","name":"https://github.com/composer/composer/releases/tag/2.10.2","tags":["x_refsource_MISC"]},{"url":"https://github.com/composer/composer/releases/tag/2.2.29","name":"https://github.com/composer/composer/releases/tag/2.2.29","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":7,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-22","lang":"en","description":"CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-787","lang":"en","description":"CWE-787: Out-of-bounds Write","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-07-08T19:33:48.414Z"},"source":{"advisory":"GHSA-499r-g7pc-vmp9","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-09T14:32:00.579490Z","id":"CVE-2026-59948","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-07-09T14:32:07.719Z"}}]}}}