CVE-2026-59948 — Composer: Arbitrary file write outside vendor via malicious transitive package name

2026-09-28T16:00:58.395583+00:00

Affected: composer

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.

Most recent entries from all

CVE-2026-59948 — Composer: Arbitrary file write outside vendor via malicious transitive package name