Medium
http-proxy-middleware can call writeBody twice because "else if" is not used
In http-proxy-middleware before 2.0.8 and 3.x before 3.0.4, writeBody can be called twice because "else if" is not used.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | http-proxy-middleware | >= 1.3.0, < 2.0.8, >= 3.0.0, < 3.0.4 | 2.0.8, 3.0.4 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2025-32996
- https://github.com/chimurai/http-proxy-middleware/pull/1089
- https://github.com/chimurai/http-proxy-middleware/commit/020976044d113fc0bcbbaf995e91d05e2829a145
- https://github.com/chimurai/http-proxy-middleware
- https://github.com/chimurai/http-proxy-middleware/releases/tag/v2.0.8
- https://github.com/chimurai/http-proxy-middleware/releases/tag/v3.0.4
CVSS score
4/10
- CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:L- Weakness (CWE)
CWE-670- Platform
- npm
- Package
http-proxy-middleware- Disclosed
- 15.04.2025
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-4www-5p9h-95mh - CC BY 4.0
Vulnerability history: http-proxy-middleware
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
- 5
- First → latest
- 10.2024 06.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 2
- Medium 3
Disclosures per year
- 2024: 1
- 2025: 2
- 2026: 2
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http-proxy-middleware can call writeBody twice because "else if" is not used this entry
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