Medium severity6.5NVD Advisory· Published Mar 16, 2026· Updated Jul 15, 2026
CVE-2025-69196
CVE-2025-69196
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.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
fastmcpPyPI | < 2.14.2 | 2.14.2 |
Affected products
3Patches
Vulnerability mechanics
References
7- github.com/PrefectHQ/fastmcp/security/advisories/GHSA-5h2m-4q8j-pqpjnvdExploitMitigationVendor AdvisoryWEB
- github.com/advisories/GHSA-5h2m-4q8j-pqpjghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2025-69196ghsaADVISORY
- access.redhat.com/errata/RHSA-2026:36350nvd
- access.redhat.com/security/cve/CVE-2025-69196nvd
- bugzilla.redhat.com/show_bug.cginvd
- security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-69196.jsonnvd
News mentions
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