CVSS 4.0
7.4 highCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:NCVE-2025-69196
High (7.4) in jlowin fastmcp. EPSS 0.4% chance of exploitation in the next 30 days. Fixed in fastmcp 2.14.2.
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.
Severity
CVSS 3.1
6.5 mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N- EPSS
- 0.4% chance of exploitation in the next 30 days; higher than 31% of CVEs (scores of 2026-10-31)
- CWEs
- CWE-863, CWE-1220
- Published
- Modified
- Record from
- the NVD, synced
Affected
- jlowin:fastmcp
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-5h2m-4q8j-pqpj | PyPI | fastmcp | <2.14.2 | 2.14.2 |
| PYSEC-2026-2474 | PyPI | fastmcp | <2.14.2 | 2.14.2 |
References
- https://github.com/PrefectHQ/fastmcp/security/advisories/GHSA-5h2m-4q8j-pqpj
- https://access.redhat.com/errata/RHSA-2026:36350
- https://access.redhat.com/security/cve/CVE-2025-69196
- https://bugzilla.redhat.com/show_bug.cgi?id=2448179
- https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-69196.json