CVE-2026-2950 (Medium) detected in lodash-es-4.17.21.tgz

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CVE-2026-2950 - Medium Severity Vulnerability

Vulnerable Library - lodash-es-4.17.21.tgz

Lodash exported as ES modules.

Library home page: https://registry.npmjs.org/lodash-es/-/lodash-es-4.17.21.tgz

Path to dependency file: /package.json

Path to vulnerable library: /package.json

Dependency Hierarchy:

• ❌ lodash-es-4.17.21.tgz (Vulnerable Library)

Found in HEAD commit: 36a9c5d28529109984de6fcc3d0a157d561dac4a

Found in base branch: master

Vulnerability Details

Impact:
Lodash versions 4.17.23 and earlier are vulnerable to prototype pollution in the _.unset and _.omit functions. The fix for (CVE-2025-13465: GHSA-xxjr-mmjv-4gpg) only guards against string key members, so an attacker can bypass the check by passing array-wrapped path segments. This allows deletion of properties from built-in prototypes such as Object.prototype, Number.prototype, and String.prototype.
The issue permits deletion of prototype properties but does not allow overwriting their original behavior.
Patches:
This issue is patched in 4.18.0.
Workarounds:
None. Upgrade to the patched version.

Publish Date: 2026-03-31

URL: CVE-2026-2950

CVSS 3 Score Details (6.5)

Base Score Metrics:

• Exploitability Metrics:
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: None
  • User Interaction: None
  • Scope: Unchanged
• Impact Metrics:
  • Confidentiality Impact: None
  • Integrity Impact: Low
  • Availability Impact: Low

For more information on CVSS3 Scores, click here.

Suggested Fix

Type: Upgrade version

Origin: GHSA-xxjr-mmjv-4gpg

Release Date: 2026-03-31

Fix Resolution: 4.17.23

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