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High · 8.6 Public exploit CVE-2026-42089 EUVD-2026-37131GHSA-vv9j-gjw2-j8wp

yeoman-environment Vulnerable to Arbitrary Package Installation without User Confirmation

Published Jun 16, 2026 · Updated Jun 16, 2026 · Assigned by GitHub_M

Vendor: yeoman Product: environment Package: yeoman-environment Ecosystem: npm

Description

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 products

VendorProductAffectedFixed
yeoman environment >= 2.9.0, < 6.0.1 —

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

GitHub 1 repository

  • 0xmrma/CVE-2026-42089 ★ 0 · Jun 26, 2026

    A local package installation helper trusted caller-supplied package names too much. In yeoman-environment, missing generators could be installed without user confirmation, turning attacker-controlled…

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

Affected packages

EcosystemPackageAffectedFixedRecord
npm yeoman-environment >= 2.9.0, < 6.0.1 6.0.1 GHSA-vv9j-gjw2-j8wp

References