body-parser is vulnerable to denial of service when url encoding is used
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.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | body-parser | >= 2.2.0, < 2.2.1 | 2.2.1 |
References
- https://github.com/expressjs/body-parser/security/advisories/GHSA-wqch-xfxh-vrr4
- https://nvd.nist.gov/vuln/detail/CVE-2025-13466
- https://github.com/expressjs/body-parser/commit/b204886a6744b0b6d297cd0e849d75de836f3b63
- https://github.com/expressjs/body-parser
- https://github.com/expressjs/body-parser/releases/tag/v2.2.1
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L- Weakness (CWE)
CWE-400- Platform
- npm
- Package
body-parser- Disclosed
- 25.11.2025
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-wqch-xfxh-vrr4 - CC BY 4.0
Vulnerability history: body-parser
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 3
- First → latest
- 09.2024 07.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 1
- Medium 1
- Low 1
Disclosures per year
- 2024: 1
- 2025: 1
- 2026: 1
-
body-parser is vulnerable to denial of service when url encoding is used this entry
Know which vulnerabilities affect your application
With the DockRay integration and software inventory enabled, DockRay checks reported component versions against known vulnerabilities and notifies you about confirmed matches. Coverage depends on the supported technology and available advisory data.