{"id":"BIT-composer-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":["CVE-2026-59948","GHSA-499r-g7pc-vmp9"],"modified":"2026-07-27T09:00:09.617836113Z","published":"2026-07-14T08:41:01.133Z","database_specific":{"severity":"High","cpes":["cpe:2.3:a:getcomposer:composer:*:*:*:*:*:*:*:*","cpe:2.3:a:getcomposer:composer:*:*:*:*:*:php:*:*"]},"references":[{"type":"WEB","url":"https://github.com/composer/composer/commit/502c6c4f699802d9cf464728b3e8a95674f919a0"},{"type":"WEB","url":"https://github.com/composer/composer/commit/c50b1efd13ebd73f6dca19b31424c5a02bf93cc1"},{"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":"WEB","url":"https://github.com/composer/composer/security/advisories/GHSA-499r-g7pc-vmp9"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-59948"}],"affected":[{"package":{"name":"composer","ecosystem":"Bitnami","purl":"pkg:bitnami/composer"},"ranges":[{"type":"SEMVER","events":[{"introduced":"1.0.0"},{"fixed":"2.2.29"},{"introduced":"2.3.0"},{"fixed":"2.10.2"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/composer/BIT-composer-2026-59948.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H"}]}],"schema_version":"1.7.5"}