CVSS 3.1
7.0 highCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:HCVE-2026-59948
High (7.0). EPSS 0.1% chance of exploitation in the next 30 days.
Composer is a dependency Manager for the PHP language. Prior to 2.2.29 and 2.10.2, a maliciously crafted package from an untrusted repository other than Packagist.org or Private Packagist can cause Composer to write attacker-controlled files outside the vendor directory and outside the project during install or update by using an invalid package name that is not correctly validated before dependency-resolution results are written or installed. This issue is fixed in versions 2.2.29 and 2.10.2.
Severity
- EPSS
- 0.1% chance of exploitation in the next 30 days; higher than 3% of CVEs (scores of 2026-10-31)
- CWEs
- CWE-22, CWE-787
- Published
- Modified
- Record from
- the NVD, synced
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-499r-g7pc-vmp9