CVE-2026-59946
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…
Does this matter?
Lower severity and a low EPSS score (0.17%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 6.1 MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N
- EPSS
- 0.17% probability · 7th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-22, CWE-732
- Source
- security-advisories@github.com
References
- https://github.com/composer/composer/commit/502c6c4f699802d9cf464728b3e8a95674f919a0
- https://github.com/composer/composer/commit/c50b1efd13ebd73f6dca19b31424c5a02bf93cc1
- https://github.com/composer/composer/releases/tag/2.10.2
- https://github.com/composer/composer/releases/tag/2.2.29
- https://github.com/composer/composer/security/advisories/GHSA-gjfg-22fp-rrxx
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.