Technology · PyPI
fastmcp (PyPI) vulnerabilities
Updated . Rebuilt every hour.
Junglewise Threat Intelligence has tracked 10 vulnerabilities in fastmcp (PyPI): 0 in the last 7 days and 2 in the last 90 days, 1 of them critical and 0 exploited in the wild. The most recent, FastMCP post-transform component authorization bypass, was published on 23 October 2026. 2 vulnerabilities in the last four weeks, up from none in the four before.
- Last 7 days
- 0
- Last 90 days
- 2
- Critical, all time
- 1
- Exploited in the wild
- 0
About fastmcp (PyPI)
fastmcp is a Python library for building Model Context Protocol servers with minimal boilerplate code.
Latest fastmcp (PyPI) vulnerabilities
- FastMCP post-transform component authorization bypassmediumCVSS 6.8
- FastMCP OAuth provider missing issuer binding in M2M credential exchangemediumCVSS 5.9
- CVE-2026-27124: FastMCP confused deputy vulnerability in OAuthProxy callbackmediumCVSS 6.1EPSS 0.3%
- CVE-2025-64340: PrefectHQ FastMCP command injection in CLI install on WindowsmediumCVSS 6.7EPSS 0.7%
- CVE-2026-32871: PrefectHQ FastMCP path traversal and SSRF in OpenAPIProvidercriticalCVSS 10EPSS 1.4%
- CVE-2025-69196: PrefectHQ FastMCP improper resource handling in OAuth ProxymediumCVSS 6.5EPSS 0.4%
- FastMCP updated to MCP 1.23+ due toinfo
- FastMCP Auth Integration Allows for Confused Deputy Account TakeovermediumCVSS 4
- CVE-2025-62801: PYSEC-2026-1365 - FastMCP vulnerable to windows command injection in FastMCP Cursor installer via server_namehighCVSS 7.8EPSS 0.2%
- CVE-2025-62800: PYSEC-2026-1364 - FastMCP vulnerable to reflected XSS in client's callback pagemediumCVSS 6.1EPSS 0.3%
Most severe fastmcp (PyPI) vulnerabilities
Exploited in the wild first, then by severity and CVSS score.
- CVE-2026-32871: PrefectHQ FastMCP path traversal and SSRF in OpenAPIProvidercriticalCVSS 10EPSS 1.4%
- CVE-2025-62801: PYSEC-2026-1365 - FastMCP vulnerable to windows command injection in FastMCP Cursor installer via server_namehighCVSS 7.8EPSS 0.2%
- FastMCP post-transform component authorization bypassmediumCVSS 6.8
- CVE-2025-64340: PrefectHQ FastMCP command injection in CLI install on WindowsmediumCVSS 6.7EPSS 0.7%
- CVE-2025-69196: PrefectHQ FastMCP improper resource handling in OAuth ProxymediumCVSS 6.5EPSS 0.4%
- CVE-2026-27124: FastMCP confused deputy vulnerability in OAuthProxy callbackmediumCVSS 6.1EPSS 0.3%
- CVE-2025-62800: PYSEC-2026-1364 - FastMCP vulnerable to reflected XSS in client's callback pagemediumCVSS 6.1EPSS 0.3%
- FastMCP OAuth provider missing issuer binding in M2M credential exchangemediumCVSS 5.9
- FastMCP Auth Integration Allows for Confused Deputy Account TakeovermediumCVSS 4
- FastMCP updated to MCP 1.23+ due toinfo
Vulnerabilities per week
2 vulnerabilities in the last four weeks, up from none in the four before. The last 13 weeks, by the week each vulnerability was published.
| Week of | Bar | Vulns | Critical |
|---|---|---|---|
| 17 Aug 2026 | 0 | 0 | |
| 24 Aug 2026 | 0 | 0 | |
| 31 Aug 2026 | 0 | 0 | |
| 7 Sep 2026 | 0 | 0 | |
| 14 Sep 2026 | 0 | 0 | |
| 21 Sep 2026 | 0 | 0 | |
| 28 Sep 2026 | 0 | 0 | |
| 5 Oct 2026 | 0 | 0 | |
| 12 Oct 2026 | 0 | 0 | |
| 19 Oct 2026 | 2 | 0 | |
| 26 Oct 2026 | 0 | 0 | |
| 2 Nov 2026 | 0 | 0 | |
| 9 Nov 2026 | 0 | 0 |
Embed a badge
A live badge for a README, a status page or an internal wiki: how many fastmcp (PyPI) vulnerabilities were published in the last 7 days and how many of them are critical, refreshed hourly.
[](https://junglewise.ai/threats/technologies/fastmcp)<a href="https://junglewise.ai/threats/technologies/fastmcp"><img src="https://junglewise.ai/threats/technologies/fastmcp/badge.svg" alt="fastmcp (PyPI) vulnerabilities" /></a>How this is built
Junglewise Threat Intelligence collects vulnerabilities from NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories, and matches each one to the technologies and vendors it affects. Dates are the date a vulnerability was published, in UTC.
The pages are rebuilt from the database every hour. Frozen weekly and monthly reports never change once published, so they can be cited.
Use this data
The same data is at https://junglewise.ai/threats/technologies/fastmcp.json, and this page as text at https://junglewise.ai/threats/technologies/fastmcp.md, for scripts and language models. It is free to reuse under CC BY 4.0 with a link back to this page.
Cite as: Junglewise Threat Intelligence, "fastmcp (PyPI) vulnerabilities", https://junglewise.ai/threats/technologies/fastmcp, 13 November 2026.