CVE-2026-59946
Composer: Path traversal in package bin field lets dependencies chmod arbitrary host files
CVSS Score
6.1
EPSS Score
0.1%
EPSS Percentile
3th
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.
| CWE | CWE-22 CWE-732 |
| Vendor | composer |
| Product | composer |
| Published | Jul 8, 2026 |
| Last Updated | Jul 9, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
Low
Availability
None
Affected Versions
composer / composer
>= 1.0, < 2.2.29 >= 2.3.0, < 2.10.2
References
github.com: https://github.com/composer/composer/security/advisories/GHSA-gjfg-22fp-rrxx github.com: https://github.com/composer/composer/commit/502c6c4f699802d9cf464728b3e8a95674f919a0 github.com: https://github.com/composer/composer/commit/c50b1efd13ebd73f6dca19b31424c5a02bf93cc1 github.com: https://github.com/composer/composer/releases/tag/2.10.2 github.com: https://github.com/composer/composer/releases/tag/2.2.29