Packages / body-parser / Security

ModerateVulnerabilityGHSA-wqch-xfxh-vrr4CVE-2025-13466Published 25 Nov 2025

body-parser is vulnerable to denial of service when url encoding is used

Your version

Affected releases · body-parser

  • 2.x2.2.0Fixed in 2.2.1

On 2.x, the newest line:

npm install body-parser@2.2.1
Every release on a timeline

  1. Not affected

    1.0.0 – 2.1.0

    80 releases

  2. Affected

    2.2.0

    1 release

  3. Fixed

    2.2.1 – 2.4.0

    4 releases, latest

85 stable releases of body-parser, oldest to newest.

What happens

Impact

body-parser 2.2.0 is vulnerable to denial of service due to inefficient handling of URL-encoded bodies with very large numbers of parameters. An attacker can send payloads containing thousands of parameters within the default 100KB request size limit, causing elevated CPU and memory usage. This can lead to service slowdown or partial outages under sustained malicious traffic.

Patches

This issue is addressed in version 2.2.1.