CVE-2026-59946
Medium
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.
SeverityMedium
CVSS6.1
Exploit probability—
ProductComposer/composer
PublishedJul 8, 2026
First seenJul 8, 2026
Weakness typeCWE-22Path traversalCWE-732CWE-732
How to fix
Update
- composer/composer2.10.2, 2.2.29 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| composer/composerPackagist | 2.3.0 ≤ v < 2.10.2, 1.0.0 ≤ v < 2.2.29 | 2.10.2, 2.2.29 |
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