yeoman/environment · Security
yeoman-environment Vulnerable to Arbitrary Package Installation without User Confirmation
- GHSA ID
- GHSA-vv9j-gjw2-j8wp
- CVE ID
- CVE-2026-42089
- Severity
- high
- Published
- Updated
- CVSS
- 8.6 · CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
- CVSS v3
- 8.6 · CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Description
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
CWEs
- CWE-829 · Inclusion of Functionality from Untrusted Control Sphere
References
- https://github.com/yeoman/environment/security/advisories/GHSA-vv9j-gjw2-j8wp ↗
- https://github.com/yeoman/environment/commit/78d2af7e60294784b8a8b3b3b5099c6874b6a1fa ↗
- https://nvd.nist.gov/vuln/detail/CVE-2026-42089 ↗
- https://github.com/yeoman/environment/pull/753 ↗
- https://github.com/advisories/GHSA-vv9j-gjw2-j8wp ↗