Server-side Request Forgery (SSRF) Affecting mcp-fetch-server package, versions *
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published10 Dec 2025
- disclosed9 Dec 2025
- creditTeam off-course (K-Shield.Jr 15th )
Introduced: 9 Dec 2025
NewCVE-2025-65513 (opens in a new tab)How to fix?
A fix was pushed into the master branch but not yet published.
Overview
mcp-fetch-server is an An MCP server offering simple HTTP fetch functionality
Affected versions of this package are vulnerable to Server-side Request Forgery (SSRF) via the fetch method, in the is_ip_private() function. An attacker can access internal network resources by sending crafted requests that bypass the intended private IP blocking, which does not perform its expected function.
Workaround
This vulnerability can be mitigated by replacing the is_ip_private(url) to is_ip_private(URL.hostname)