High severity7.0OSV Advisory· Published Jul 8, 2026· Updated Jul 10, 2026
CVE-2026-59948
CVE-2026-59948
Description
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.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
composer/composerPackagist | >= 2.3.0, < 2.10.2 | 2.10.2 |
composer/composerPackagist | >= 1.0.0, < 2.2.29 | 2.2.29 |
Affected products
5- osv-coords3 versionspkg:bitnami/composerpkg:rpm/opensuse/php-composer2&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/php-composer2&distro=openSUSE%20Tumbleweed
>= 1.0.0, < 2.2.29+ 2 more
- (no CPE)range: >= 1.0.0, < 2.2.29
- (no CPE)range: < 2.8.9-160000.4.1
- (no CPE)range: < 2.10.2-1.1
Patches
Vulnerability mechanics
References
7- github.com/advisories/GHSA-499r-g7pc-vmp9ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-59948ghsaADVISORY
- github.com/composer/composer/commit/502c6c4f699802d9cf464728b3e8a95674f919a0nvdWEB
- github.com/composer/composer/commit/c50b1efd13ebd73f6dca19b31424c5a02bf93cc1nvdWEB
- github.com/composer/composer/releases/tag/2.10.2nvdWEB
- github.com/composer/composer/releases/tag/2.2.29nvdWEB
- github.com/composer/composer/security/advisories/GHSA-499r-g7pc-vmp9nvdWEB
News mentions
1- Composer: Three Vulnerabilities in Package Handling and Credential Leakage PatchedVypr Intelligence · Jul 10, 2026