Prototype Pollution Vulnerability in Node.js Messageformat Package
CVE-2025-57353

5.3MEDIUM

Key Information:

Vendor

Node.js

Status
messageformat
Vendor
CVE Published:
24 September 2025

What is CVE-2025-57353?

The messageformat package for Node.js prior to version 3.0.1 is susceptible to a prototype pollution vulnerability due to inadequate validation of nested message keys. This flaw allows attackers to craft malicious input that can manipulate the prototype chain of JavaScript objects. By exploiting this vulnerability, an attacker can inject arbitrary properties into the Object.prototype, which may lead to unexpected application behavior or denial of service conditions throughout the application's lifecycle. This critical issue has yet to be addressed in the current version.

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References

https://github.com/messageformat/messageformat/issues/453
https://github.com/VulnSageAgent/PoCs/tree/main/JavaScrip...
https://github.com/messageformat/messageformat/pull/464

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

JSON
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