{"id":"UBUNTU-CVE-2026-59948","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.","modified":"2026-07-15T19:47:53.366096187Z","published":"2026-07-08T20:16:00Z","upstream":["CVE-2026-59948"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-59948"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-59948"},{"type":"REPORT","url":"https://github.com/composer/composer/security/advisories/GHSA-499r-g7pc-vmp9"}],"affected":[{"package":{"name":"composer","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/composer?arch=source&distro=esm-apps%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.0.0~alpha10+20150602-1","1.0.0~alpha10+20150602-2","1.0.0~alpha11-1","1.0.0~alpha11-1ubuntu1","1.0.0~alpha11-2","1.0.0~alpha11-3","1.0.0~beta1-1ubuntu1","1.0.0~beta2-1","1.0.0~beta2-1ubuntu0.1~esm1","1.0.0~beta2-1ubuntu0.1~esm2"],"ecosystem_specific":{"binaries":[{"binary_name":"composer","binary_version":"1.0.0~beta2-1ubuntu0.1~esm2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59948.json"}},{"package":{"name":"composer","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/composer?arch=source&distro=esm-apps%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.5.1-1","1.5.2-1","1.6.2-1","1.6.3-1","1.6.3-1ubuntu0.1~esm1","1.6.3-1ubuntu0.1~esm2"],"ecosystem_specific":{"binaries":[{"binary_name":"composer","binary_version":"1.6.3-1ubuntu0.1~esm2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59948.json"}},{"package":{"name":"composer","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/composer?arch=source&distro=esm-apps%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.9.0-2","1.9.1-1","1.9.2-1","1.9.3-1","1.10.0-1","1.10.1-1","1.10.1-1ubuntu0.1~esm1","1.10.1-1ubuntu0.1~esm2"],"ecosystem_specific":{"binaries":[{"binary_name":"composer","binary_version":"1.10.1-1ubuntu0.1~esm2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59948.json"}},{"package":{"name":"composer","ecosystem":"Ubuntu:Pro:22.04:LTS","purl":"pkg:deb/ubuntu/composer?arch=source&distro=esm-apps%2Fjammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.0.9-2ubuntu2","2.0.9-2ubuntu3","2.0.13-1ubuntu1","2.1.12-1ubuntu1","2.2.6-2ubuntu4","2.2.6-2ubuntu4+esm1"],"ecosystem_specific":{"binaries":[{"binary_version":"2.2.6-2ubuntu4+esm1","binary_name":"composer"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59948.json"}},{"package":{"name":"composer","ecosystem":"Ubuntu:Pro:24.04:LTS","purl":"pkg:deb/ubuntu/composer?arch=source&distro=esm-apps%2Fnoble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.5.8-1","2.6.5-1","2.6.6-1","2.7.1-2","2.7.1-2ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_version":"2.7.1-2ubuntu0.1~esm1","binary_name":"composer"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59948.json"}},{"package":{"name":"composer","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/composer?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.8.6-1","2.8.8-1"],"ecosystem_specific":{"binaries":[{"binary_name":"composer","binary_version":"2.8.8-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59948.json"}},{"package":{"name":"composer","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/composer?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.8.8-1","2.9.5-1"],"ecosystem_specific":{"binaries":[{"binary_name":"composer","binary_version":"2.9.5-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59948.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}