CVE-2025-64340

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Source
https://cve.org/CVERecord?id=CVE-2025-64340
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-64340.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2025-64340
Aliases
Downstream
Published
2026-04-03T15:16:13.930Z
Modified
2026-07-08T08:12:20.009445477Z
Severity
  • 6.7 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H CVSS Calculator
Summary
FastMCP has a Command Injection vulnerability - Gemini CLI
Details

FastMCP is the standard framework for building MCP applications. Prior to version 3.2.0, server names containing shell metacharacters (e.g., &) can cause command injection on Windows when passed to fastmcp install claude-code or fastmcp install gemini-cli. These install paths use subprocess.run() with a list argument, but on Windows the target CLIs often resolve to .cmd wrappers that are executed through cmd.exe, which interprets metacharacters in the flattened command string. This issue has been patched in version 3.2.0.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/64xxx/CVE-2025-64340.json",
    "cwe_ids": [
        "CWE-78"
    ],
    "cna_assigner": "GitHub_M"
}
References

Affected packages

Git / github.com/prefecthq/fastmcp

Affected ranges

Type
GIT
Repo
https://github.com/prefecthq/fastmcp
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
665514e19a78543709be85b4261153bbe98e882f
Database specific 
{
    "source": [
        "AFFECTED_FIELD",
        "CPE_RANGE"
    ],
    "cpe": "cpe:2.3:a:jlowin:fastmcp:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "3.2.0"
        }
    ]
}

Affected versions

v0.*
v0.1.0
v0.2.0
v0.3.0
v0.3.1
v0.3.2
v0.3.3
v0.3.4
v0.3.5
v0.4.0
v0.4.1
v1.*
v1.0
v2.*
v2.0.0
v2.1.0
v2.1.1
v2.1.2
v2.10.0
v2.10.1
v2.10.2
v2.10.3
v2.10.4
v2.10.5
v2.10.6
v2.11.0
v2.11.1
v2.11.2
v2.11.3
v2.12.0
v2.12.0rc1
v2.12.1
v2.12.2
v2.12.3
v2.12.4
v2.13.0
v2.13.0.1
v2.13.0rc1
v2.13.0rc2
v2.13.0rc3
v2.13.1
v2.13.2
v2.14.0
v2.14.1
v2.2.0
v2.2.1
v2.2.10
v2.2.2
v2.2.3
v2.2.4
v2.2.5
v2.2.6
v2.2.7
v2.2.8
v2.2.9
v2.3.0
v2.3.0-rc.1
v2.3.0-rc.2
v2.3.1
v2.3.2
v2.3.3
v2.3.4
v2.3.5
v2.4.0
v2.5.0
v2.5.1
v2.5.2
v2.6.0
v2.6.1
v2.7.0
v2.7.1
v2.8.0
v2.8.1
v2.9.0
v2.9.1
v2.9.2
v3.*
v3.0.0
v3.0.0b1
v3.0.0b2
v3.0.0rc1
v3.0.0rc2
v3.0.0rc3
v3.0.1
v3.0.2
v3.1.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-64340.json"