CVE-2026-59946

MEDIUM6.1

Composer: Path traversal in package bin field lets dependencies chmod arbitrary host files

Published Jul 8, 2026

Modified 2 weeks ago

Details

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.

References

WEB

https://github.com/composer/composer/commit/502c6c4f699802d9cf464728b3e8a95674f919a0

WEB

https://github.com/composer/composer/commit/c50b1efd13ebd73f6dca19b31424c5a02bf93cc1

WEB

https://github.com/composer/composer/releases/tag/2.10.2

WEB

https://github.com/composer/composer/releases/tag/2.2.29

WEB

https://github.com/composer/composer/security/advisories/GHSA-gjfg-22fp-rrxx

ADVISORY