CVE-2025-57353

Medium

Description

The Runtime components of messageformat package for Node.js before 3.0.2 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.

SeverityMedium
CVSS5.3
Exploit probability—
Product@messageformat/runtime
PublishedSep 24, 2025
First seenSep 24, 2025

How to fix

Update
  • @messageformat/runtime3.0.2 or later

Affected products

ProductAffected versionsFixed in
@messageformat/runtimenpm3.0.1 ≤ v < 3.0.23.0.2

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