GitHub Advisoryadvisory · npm

GHSA-6xv4-9cqp-92rh messageformat prototype pollution vulnerability

MEDIUM Published 2025-09-24 Modified 2025-10-31 Official page ↗
Aliases
CVE-2025-57353
Ecosystem
npm
Packages
@messageformat/runtime
Severity
Moderate
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weaknesses
CWE-1321
Reviewed
2025-09-24

Affected packages

• npm @messageformat/runtime: >= 3.0.1, < 3.0.2 → fixed in 3.0.2

Description

The Runtime components of messageformat package for Node.js version 3.0.1 contain a prototype pollution vulnerability. Due to insufficient validation of nested message keys during the processing of message data, an attacker can manipulate the prototype chain of JavaScript objects by providing specially crafted input. This can result in the injection of arbitrary properties into the Object.prototype, potentially leading to denial of service conditions or unexpected application behavior. The vulnerability allows attackers to alter the prototype of base objects, impacting all subsequent object instances throughout the application's lifecycle. Version 3.0.2 contains a fix.

Related

Alias · CVE (1)

  • CVE-2025-57353 The Runtime components of messageformat package for Node.js before 3.0.2 contain a prototype pollution vulnerability. vulnerability

Weakness · CWE (1)

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

References