CVE-2026-59948 — Composer: Arbitrary file write outside vendor via malicious transitive package name
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…
Published: 2026-07-08 · CVSS: 7.0 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7