Miniflare vulnerable to Server-Side Request Forgery (SSRF)
Impact
Sending specially crafted HTTP requests to Miniflare's server could result in arbitrary HTTP and WebSocket requests being sent from the server. If Miniflare was configured to listen on external network interfaces (as was the default in wrangler until 3.19.0), an attacker on the local network could access other local servers.
Patches
The issue was fixed in miniflare@3.20231030.2.
Workarounds
Ensure Miniflare is configured to listen on just local interfaces. This is the default behaviour, but can also be configured with the host: "127.0.0.1" option.
References
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | miniflare | >= 3.20230821.0, < 3.20231030.2 | 3.20231030.2 |
References
- CVSS vector
CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N- Weakness (CWE)
CWE-918- Platform
- npm
- Package
miniflare- Disclosed
- 29.12.2023
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-fwvg-2739-22v7 - CC BY 4.0
Vulnerability history: miniflare
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
This is the only known vulnerability of this package.
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