{"action":"Upgrade composer/composer to 2.2.29 or later.","affected":[{"fixed":"2.10.2","introduced":"2.3.0"},{"fixed":"2.2.29","introduced":"1.0.0"}],"component":"composer/composer","cve_ids":["CVE-2026-59948"],"ecosystem":"Packagist","epss":0.00138,"exploited":false,"fixed_versions":["2.10.2","2.2.29"],"ghsa_id":"GHSA-499r-g7pc-vmp9","id":"tcs_01M5KETTZ9B6FYG1BAQMHWMYB7","modified_at":"2026-07-20T19:30:24.128985789Z","published_at":"2026-07-20T19:15:29Z","references":["https://osv.dev/vulnerability/GHSA-499r-g7pc-vmp9","https://github.com/composer/composer/security/advisories/GHSA-499r-g7pc-vmp9","https://nvd.nist.gov/vuln/detail/CVE-2026-59948","https://github.com/composer/composer/commit/502c6c4f699802d9cf464728b3e8a95674f919a0","https://github.com/composer/composer/commit/c50b1efd13ebd73f6dca19b31424c5a02bf93cc1","https://github.com/composer/composer","https://github.com/composer/composer/releases/tag/2.10.2","https://github.com/composer/composer/releases/tag/2.2.29"],"severity":{"label":"high","score":7},"sources":[{"source":"osv","source_id":"GHSA-499r-g7pc-vmp9","url":"https://osv.dev/vulnerability/GHSA-499r-g7pc-vmp9"}],"summary":"Composer: Arbitrary file write outside vendor via malicious transitive package name"}