PYSEC-2026-2475 FastMCP has a Command Injection vulnerability - Gemini CLI

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...

PYSEC-2026-2474 FastMCP OAuth Proxy token reuse across MCP servers

While testing the OAuth Proxy implementation, it was noticed that 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 this MCP server, the token is issued for the baseurl passed to...

PYSEC-2026-1365 FastMCP vulnerable to windows command injection in FastMCP Cursor installer via server_name

Summary A command-injection vulnerability lets any attacker who can influence the servername field of an MCP execute arbitrary OS commands on Windows hosts that run fastmcp install cursor Details 1. generatecursordeeplinkservername, … embeds servername verbatim in a cursor://…?name= query string...

PYSEC-2026-1364 FastMCP vulnerable to reflected XSS in client's callback page

Summary While setting up an oauth client, it was noticed that the callback page hosted by the client during the flow embeds user-controlled content without escaping or sanitizing it. This leads to a reflected Cross-Site-Scripting vulnerability. Details The affected code is located in...

aa-rag (=0.4.3), acex (>=3.0.0 <=5.28.0) +825 more potentially affected by CVE-2026-32871 via fastmcp (>=0.1.0 <=3.1.1)

fastmcp PYPI version =0.1.0, =3.0.0, =0.2.0, =0.1.0, =0.1.7, =2.1.7, =0.1.0, =1.0.0, =0.4.6, =0.1.0, =1.8.0, =0.1.1, =0.1.5 and more Source cves: CVE-2026-32871 Source advisory: OSV:PYSEC-2026-338...

ROOT-APP-PYPI-GHSA-C2JP-C369-7PVX GHSA-c2jp-c369-7pvx in rootio-fastmcp - Patched by Root

Root has patched GHSA-c2jp-c369-7pvx in the rootio-fastmcp package for Root:PyPI. Multiple fixed versions available...

ROOT-APP-PYPI-CVE-2025-64340 CVE-2025-64340 in rootio-fastmcp - Patched by Root

Root has patched CVE-2025-64340 in the rootio-fastmcp package for Root:PyPI. Multiple fixed versions available...

ROOT-APP-PYPI-CVE-2026-27124 CVE-2026-27124 in rootio-fastmcp - Patched by Root

Root has patched CVE-2026-27124 in the rootio-fastmcp package for Root:PyPI. Multiple fixed versions available...

ROOT-APP-PYPI-CVE-2026-32871 CVE-2026-32871 in rootio-fastmcp - Patched by Root

Root has patched CVE-2026-32871 in the rootio-fastmcp package for Root:PyPI. Multiple fixed versions available...

ROOT-APP-PYPI-CVE-2025-62800 CVE-2025-62800 in rootio-fastmcp - Patched by Root

Root has patched CVE-2025-62800 in the rootio-fastmcp package for Root:PyPI. Multiple fixed versions available...

ROOT-APP-PYPI-CVE-2025-62801 CVE-2025-62801 in rootio-fastmcp - Patched by Root

Root has patched CVE-2025-62801 in the rootio-fastmcp package for Root:PyPI. Multiple fixed versions available...

ROOT-APP-PYPI-CVE-2025-69196 CVE-2025-69196 in rootio-fastmcp - Patched by Root

Root has patched CVE-2025-69196 in the rootio-fastmcp package for Root:PyPI. Multiple fixed versions available...

CVE-2026-7213

A vulnerability was detected in ef10007 MLOpsMCP 1.0.0. This impacts an unknown function of the file fastmcpserver.py of the component savefile Tool. The manipulation of the argument filename/destination results in path traversal. The attack may be performed from remote. The exploit is now public...

CVE-2026-7213 ef10007 MLOps_MCP save_file Tool fastmcp_server.py path traversal

A vulnerability was detected in ef10007 MLOpsMCP 1.0.0. This impacts an unknown function of the file fastmcpserver.py of the component savefile Tool. The manipulation of the argument filename/destination results in path traversal. The attack may be performed from remote. The exploit is now public...

EUVD-2026-25966

A vulnerability was detected in ef10007 MLOpsMCP 1.0.0. This impacts an unknown function of the file fastmcpserver.py of the component savefile Tool. The manipulation of the argument filename/destination results in path traversal. The attack may be performed from remote. The exploit is now public...

CVE-2026-7213

A vulnerability was detected in ef10007 MLOpsMCP 1.0.0. This impacts an unknown function of the file fastmcpserver.py of the component savefile Tool. The manipulation of the argument filename/destination results in path traversal. The attack may be performed from remote. The exploit is now public...

PT-2026-35586

Name of the Vulnerable Software and Affected Versions ef10007 MLOps MCP version 1.0.0 Description A path traversal issue exists in the save file Tool within the fastmcp server.py file. A remote attacker can manipulate the filename/destination argument to access or overwrite files outside the...

CVE-2025-64340

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 wit...

CVE-2026-27124

A flaw was found in FastMCP and FastMCP OAuthProxy. The OAuthProxy, used for GitHub OAuth authentication, does not properly validate a user's consent after receiving an authorization code from GitHub. This, combined with GitHub's behavior of skipping the consent page for previously authorized...

CVE-2026-32871

A flaw was found in FastMCP. An authenticated attacker can exploit a path traversal vulnerability in the buildurl method of the RequestDirector class. By manipulating path parameters in an OpenAPI operation, an attacker can use directory traversal sequences ../ to bypass the intended API prefix...