fastmcp has 4 CVEs on record between 2025 and 2026. The median CVSS is 6.7 (medium).
CVEs per month
Last 12 months, by publish date
1025/101125/111225/120126/010226/020326/030426/040526/050626/060726/070826/080926/09
- Exploited share
- 0% vs 1% corpus
- Median CVSS
- 6.7
- Publish → KEV
- —
- Last 90 days
- 0 prev 2
Products
- fastmcp 4
4
Total CVEs
0
Critical
0
CISA KEV
0
Exploited
Worst active — by depth score
CVE-2026-27124HighFastMCP: Missing Consent Verification in OAuth Proxy Callback Facilitates Confused Deputy Vulnerabilities41CVE-2025-64340Medium· 6.7FastMCP has a Command Injection vulnerability - Gemini CLI37CVE-2025-62801MediumFastMCP vulnerable to windows command injection in FastMCP Cursor installer via server_name28CVE-2025-62800MediumFastMCP vulnerable to reflected XSS in client's callback page28
fastmcp vulnerabilities
CVEs affecting fastmcp, newest first. Open any entry for full detail, references, and exploit status.
4 CVEsRSS
CVE-2026-27124HighFastMCP: Missing Consent Verification in OAuth Proxy Callback Facilitates Confused Deputy Vulnerabilities
FastMCP: Missing Consent Verification in OAuth Proxy Callback Facilitates Confused Deputy Vulnerabilities
▾ Twilightfastmcp · fastmcpEPSS 0.21%via OSV
CVE-2025-64340Medium· 6.7FastMCP has a Command Injection vulnerability - Gemini CLI
FastMCP has a Command Injection vulnerability - Gemini CLI
▾ Sunlitfastmcp · fastmcpEPSS 0.73%via OSV
CVE-2025-62801MediumFastMCP vulnerable to windows command injection in FastMCP Cursor installer via server_name
FastMCP vulnerable to windows command injection in FastMCP Cursor installer via server_name
▾ Sunlitfastmcp · fastmcpEPSS 0.21%via OSV
CVE-2025-62800MediumFastMCP vulnerable to reflected XSS in client's callback page
FastMCP vulnerable to reflected XSS in client's callback page
▾ Sunlitfastmcp · fastmcpEPSS 0.26%via OSV