CVE-2026-59946

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.

PUBLISHED Reserved 2026-07-07 | Published 2026-07-08 | Updated 2026-07-09 | Assigner GitHub_M

Problem types

CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

CWE-732: Incorrect Permission Assignment for Critical Resource

Product status

References

github.com/...mposer/security/advisories/GHSA-gjfg-22fp-rrxx

github.com/...ommit/502c6c4f699802d9cf464728b3e8a95674f919a0

github.com/...ommit/c50b1efd13ebd73f6dca19b31424c5a02bf93cc1

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

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

cve.org (CVE-2026-59946)

nvd.nist.gov (CVE-2026-59946)

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