yeoman-environment Vulnerable to Arbitrary Package Installation without User Confirmation

Impact

yeoman-environment versions >= 2.9.0 and < 6.0.1 install missing local generator packages from caller-supplied package names without user confirmation. In downstream consumers that pass attacker-controlled project configuration into this path, this can result in arbitrary package installation and code execution during CLI bootstrap.

The vulnerable method is installLocalGenerators(), which calls repository.install() directly without prompting the user.

Patches

Upgrade to yeoman-environment 6.0.1, which adds an interactive confirmation prompt before installation (PR #753).

Workarounds

None.

Resources

• Fix commit 78d2af7