# CVE-2026-59946: composer: Composer is a dependency Manager for the PHP language

CVE-2026-59946 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-59946, released July 9, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-59946
- Priority: Routine
- CVSS: 6.1 (medium)
- EPSS: 0.0014
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 8, 2026

## Description

Composer is a dependency Manager for the PHP language. Prior to 2.2.29 and 2.10.2, a Composer package bin entry containing .. path segments can resolve outside the package install directory and cause Composer's binary installation flow to chmod an existing host file to a world-readable and world-executable mode during composer install, update, or require. This issue is fixed in versions 2.2.29 and 2.10.2.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | composer Debian 14 | 2.10.2-1 | [DEBIAN-CVE-2026-59946](https://patchblox.com/security/data/fix/linux/debian-cve-2026-59946.md) | Jul 9, 2026 |
| Linux | composer amzn 2023 | 2.10.2-1.amzn2023.0.1 | [ALAS2023-2026-1941](https://patchblox.com/security/data/fix/linux/alas2023-2026-1941.md) | Jul 20, 2026 |
| Linux | php-composer2 opensuse-leap 16.0 | 2.8.9-160000.4.1 | [OPENSUSE-SU-2026:21520-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21520-1.md) | Aug 3, 2026 |
| Linux | php-composer2 sles 15.6 | 2.6.4-150600.3.12.1 | [SUSE-SU-2026:3105-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3105-1.md) | Jul 17, 2026 |
| Linux | php-composer2 sles 15.7 | 2.6.4-150600.3.12.1 | [SUSE-SU-2026:3105-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3105-1.md) | Jul 17, 2026 |
| Linux | php-composer2 sles 16.0 | 2.8.9-160000.4.1 | [SUSE-SU-2026:23138-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-23138-1.md) | Aug 3, 2026 |

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Data as of 2026-11-08T19:12:23Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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