CVE-2025-69196
6.5 · MEDIUMOverview
CVE-2025-69196 is a medium-severity vulnerability affecting jlowin fastmcp. It was published on March 16, 2026 and has a CVSS 3.1 base score of 6.5 (MEDIUM).
This vulnerability has a CVSS 3.1 base score of 6.5, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
FastMCP is the standard framework for building MCP applications. Prior to version 2.14.2, the server does not properly respect the resource parameter submitted by the client in the authorization and token request. Instead of issuing the token explicitly for the MCP server, the token is issued for the base_url passed to the OAuthProxy during initialization. This issue has been patched 2.14.2.
Remediation
Check the references section for vendor advisories and patches from jlowin. Update fastmcp to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| jlowin | fastmcp | >= 0, < 2.14.2 | Affected |
References
Frequently Asked Questions
What is CVE-2025-69196?
CVE-2025-69196 is a medium-severity vulnerability affecting jlowin fastmcp. It was published on March 16, 2026 and has a CVSS 3.1 base score of 6.5 (MEDIUM).
How severe is CVE-2025-69196?
This vulnerability has a CVSS 3.1 base score of 6.5, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2025-69196?
Check the references section for vendor advisories and patches from jlowin. Update fastmcp to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2025-69196?
CyberStrike's AI-powered security agents can automatically detect CVE-2025-69196 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
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