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CVE-2026-42089 — Vulnerability in yeoman-environment — CVE Details

HIGH

yeoman-environment Vulnerable to Arbitrary Package Installation without User Confirmation

Published May 26, 2026Updated July 8, 2026Source: osv

Summary

### 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](https://github.com/yeoman/environment/pull/753)). ### Workarounds None. ### Resources - [Fix commit 78d2af7](https://github.com/yeoman/environment/commit/78d2af7e60294784b8a8b3b3b5099c6874b6a1fa)

Advisory Timeline

  • First published May 26, 2026 (139 days ago).
  • Last revised July 8, 2026 — 43 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

npm
Update yeoman-environment to 6.0.1 or later
npm install yeoman-environment@6.0.1

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (1)

Affects 1 ecosystem: npm (1).

PackageEcosystemAffectedFixed In
yeoman-environment
npm
All versions6.0.1

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 8.6 score means for each attack dimension.

Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

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

References

Frequently Asked Questions

What is CVE-2026-42089?
yeoman-environment Vulnerable to Arbitrary Package Installation without User Confirmation This vulnerability has been assigned a severity rating of HIGH (CVSS score: 8.6/10).
How do I check if my project is affected by CVE-2026-42089?
CVE-2026-42089 affects yeoman-environment. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2026-42089 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
8.6

High exploitability or significant impact. Prioritize remediation within days.

Also Known As

GHSA-vv9j-gjw2-j8wp

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