CVE-2026-42089

yeoman-environment Vulnerable to Arbitrary Package Installation without User Confirmation

Yeoman Environment provides an API to discover, create, and run generators, and to configure where and how a generator is resolved. Versions 2.9.0 through 6.0.0 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. This issue has been fixed in version 6.0.0.

Affected

yeoman · environment

CVSS v3.1 GITHUB

8.6 HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

EPSS

0.19% chance of exploitation in the next 30 days, 9th percentile

Published

2026-06-16

Proof-of-concept exploits (1)

• 0xmrma/CVE-2026-420890★ · 2026-06-26

Security advisories

• advisories/GHSA-vv9j-gjw2-j8wp

References

• CVE Record
• NVD entry

Related

• CVE-2026-14361
• CVE-2026-32722
• CVE-2026-33146
• CVE-2026-33936
• CVE-2026-34048
• CVE-2026-34207