8.3

CVSS Score

3.1

-

CVSS Score

Basic Information

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CVE-2025-4759

CVE-2025-4759: lockfile-lint-api Vulnerable to Incorrect Behavior Order

Versions of the package lockfile-lint-api before 5.9.2 are vulnerable to Incorrect Behavior Order: Early Validation via the resolved attribute of the package URL validation which can be bypassed by extending the package name allowing an attacker to install other npm packages than the intended one.

(GitHub Advisory)

Miggo Vulnerability Database

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CVE-2025-4759

CVE-2025-4759:

8.3

CVSS Score

3.1

-

CVSS Score

Basic Information

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Technical Details

Package Name	Ecosystem	Vulnerable Versions	First Patched Version
lockfile-lint-api	npm	< 5.9.2	5.9.2

Technical Details

Vulnerability Intelligence
Miggo AI

Root Cause Analysis

The vulnerability lies in the ValidatePackageNames.js file, specifically within the validate method of the ValidatePackageNames class. The provided commit information (from both the advisory and the pull request) clearly shows a one-line change that adds a trailing slash to the expectedURLBeginning variable. This variable is used to check if a package's resolved URL starts with the expected URL prefix. Without the trailing slash, a package with a name that is a prefix of another (e.g., 'mypackage' and 'mypackage-evil') could bypass the validation. The validate method is where this check occurs. The constructor of ValidatePackageNames calls this.validate(), so it initiates the vulnerable logic, but the flaw itself is in the string construction and comparison within validate(). The patch directly addresses this flaw, and the code context from the blob URL confirms the location of this logic within the validate method.

Vulnerable functions

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WAF Rule

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Reasoning

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