composer: Composer is a dependency Manager for the PHP language
CVE-2026-59948 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-59948, released July 9, 2026. It is not reported as exploited. Patch Radar priority: High.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| composer · Debian 14 | 2.10.2-1 | DEBIAN-CVE-2026-59948 | Jul 9, 2026 |
| composer · amzn 2023 | 2.10.2-1.amzn2023.0.1 | ALAS2023-2026-1941 | Jul 20, 2026 |
| php-composer2 · opensuse-leap 16.0 | 2.8.9-160000.4.1 | OPENSUSE-SU-2026:21520-1 | Aug 3, 2026 |
| php-composer2 · sles 15.6 | 2.6.4-150600.3.12.1 | SUSE-SU-2026:3105-1 | Jul 17, 2026 |
| php-composer2 · sles 15.7 | 2.6.4-150600.3.12.1 | SUSE-SU-2026:3105-1 | Jul 17, 2026 |
| php-composer2 · sles 16.0 | 2.8.9-160000.4.1 | SUSE-SU-2026:23138-1 | Aug 3, 2026 |
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