CVE-2025-13466: body-parser denial of service in URL encoding

CVE-2025-13466 · Severity: low · CVSS 3.1 · Published 2025-11-24

body-parser is a middleware library used in Node.js web applications to parse incoming request bodies. Version 2.2.0 has a vulnerability where attackers can send specially crafted requests with thousands of URL-encoded parameters to exhaust server CPU and memory, causing service slowdown or partial outages. The attack requires no authentication and can be triggered with normal-sized requests.

Technologies: Body-Parser.

Quick answers

Is CVE-2025-13466 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2025-13466 being exploited in the wild.
How severe is CVE-2025-13466?
Low severity, with a CVSS score of 3.1, published 24 November 2025.
Which products and versions are affected?
Body-Parser SEMVER:introduced=2.2.0,fixed=2.2.1.
Is there a fix for CVE-2025-13466?
Yes. Body-Parser: upgrade to 2.2.1 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2025-13466 attacked?
It is attacked over the network, in a software library.
Am I affected by CVE-2025-13466?
Check whether you run Body-Parser at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • Body-Parser: upgrade to 2.2.1 or later

Technical details

body-parser 2.2.0 contains a denial of service vulnerability in URL-encoded request body handling due to inefficient parameter parsing. The vulnerability allows attackers to craft payloads with thousands of URL-encoded parameters within the default 100KB request size limit, causing disproportionate CPU and memory consumption. The attack vector is network-based with no authentication or user interaction required. Successful exploitation results in service degradation or partial outages under sustained attack. The issue is classified as uncontrolled resource consumption (CWE-400) and is patched in version 2.2.1.

Affected products

  • Express.js body-parser 2.2.0

Identifiers

  • CVE-2025-13466
  • GHSA-wqch-xfxh-vrr4

Timeline

  • 2025-11-25: disclosed
  • 2025-11-25: patched: Fixed in version 2.2.1

References

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