The merge-deep library before 3.0.3 for Node.js can be tricked into overwriting properties of Object.prototype or adding new properties to it. These properties are then inherited by every object in the program, thus facilitating prototype-pollution attacks against applications using this library.
CVE-2021-26707 - High Severity Vulnerability
Recursively merge values in a javascript object.
Library home page: https://registry.npmjs.org/merge-deep/-/merge-deep-3.0.2.tgz
Path to dependency file: /package.json
Path to vulnerable library: /node_modules/merge-deep/package.json
Dependency Hierarchy: - react-scripts-3.4.3.tgz (Root Library) - webpack-4.3.3.tgz - plugin-svgo-4.3.1.tgz - :x: **merge-deep-3.0.2.tgz** (Vulnerable Library)
Found in HEAD commit: 28669a49080d16cfb62291c1a10d55b431d61474
Found in base branch: main
The merge-deep library before 3.0.3 for Node.js can be tricked into overwriting properties of Object.prototype or adding new properties to it. These properties are then inherited by every object in the program, thus facilitating prototype-pollution attacks against applications using this library.
Publish Date: 2021-06-02
URL: CVE-2021-26707
Base Score Metrics: - Exploitability Metrics: - Attack Vector: Network - Attack Complexity: Low - Privileges Required: None - User Interaction: None - Scope: Unchanged - Impact Metrics: - Confidentiality Impact: High - Integrity Impact: High - Availability Impact: High
For more information on CVSS3 Scores, click here.Type: Upgrade version
Origin: https://bugzilla.redhat.com/show_bug.cgi?id=1922259
Release Date: 2021-06-02
Fix Resolution (merge-deep): 3.0.3
Direct dependency fix Resolution (react-scripts): 3.4.4