GitHub Advisoryadvisory · npm

GHSA-4vjr-hfpp-2m7w expand-object Vulnerable to Prototype Pollution via the expand() Function

MEDIUM Published 2025-04-04 Modified 2025-04-04 Official page ↗
Aliases
CVE-2025-3197
Ecosystem
npm
Packages
expand-object
Severity
Moderate
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Weaknesses
CWE-1321
Reviewed
2025-04-04

Affected packages

• npm expand-object: <= 0.4.2 (no fix yet)

Description

Versions of the package expand-object from 0.0.0 to 0.4.2 are vulnerable to Prototype Pollution in the expand() function in index.js. This function expands the given string into an object and allows a nested property to be set without checking the provided keys for sensitive properties like __proto__.

Related

Alias · CVE (1)

  • CVE-2025-3197 Versions of the package expand-object from 0.0.0 are vulnerable to Prototype Pollution in the expand() function in index.js. vulnerability

Weakness · CWE (1)

  • CWE-1321 Improperly Controlled Modification of Object Prototype Attributes weakness

References