{"answers":{"affected":"3 open source packages ship an affected version, including fastmcp. It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-69196 exists.","fix":"Upgrade fastmcp to 2.14.2 or later.","what":"CVE-2025-69196 is a high-severity authentication bypass vulnerability in jlowin fastmcp, published on 16 Mar 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2025-69196 and fix it if it is affected.\n\nWhat it is: CVE-2025-69196 is a high-severity authentication bypass vulnerability in jlowin fastmcp, published on 16 Mar 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-69196 exists.\n\nAffected packages and fixed versions:\n- fastmcp (PyPI): affected all versions; fixed in 2.14.2\n- fastmcp (PyPI): affected all versions; fixed in 2.14.2\n- fastmcp (PyPI): affected all versions; fixed in 2.14.2\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2025-69196/ (Markdown: https://insights.sbomify.com/CVE-2025-69196/index.md)","id":"CVE-2025-69196","markdown":"https://insights.sbomify.com/CVE-2025-69196/index.md","name":"CVE-2025-69196","record":{"aliases":["GHSA-5h2m-4q8j-pqpj","PYSEC-2026-2474","ROOT-APP-PYPI-CVE-2025-69196"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"FastMCP OAuth Proxy","requires_auth":"none","summary":"Attackers can reuse OAuth tokens across different MCP servers due to improper resource parameter handling in FastMCP.","user_interaction":"required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"fastmcp","vendor":"jlowin"}],"cvss":{"score":7.4,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-1220","name":"Insufficient Granularity of Access Control"},{"id":"CWE-863","name":"Incorrect Authorization"}],"description":"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.","ecosystems":["PyPI"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"FastMCP OAuth Proxy token reuse across MCP servers","id":"CVE-2025-69196","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"PyPI","product":null,"products":[],"type":"auth_bypass","year":"2025"},"n_packages":3,"n_references":1,"next":{"headline":"Pterodactyl TOTPs can be reused during validity window","id":"CVE-2025-69197"},"packages":[{"ecosystem":"PyPI","fixed":["2.14.2"],"introduced":["0"],"last_affected":[],"package":"fastmcp","purl":null,"source":"GHSA-5h2m-4q8j-pqpj"},{"ecosystem":"PyPI","fixed":["2.14.2"],"introduced":["0"],"last_affected":[],"package":"fastmcp","purl":"pkg:pypi/fastmcp","source":"GHSA-5h2m-4q8j-pqpj"},{"ecosystem":"PyPI","fixed":["2.14.2"],"introduced":["0"],"last_affected":[],"package":"fastmcp","purl":"pkg:pypi/fastmcp","source":"PYSEC-2026-2474"}],"prev":{"headline":"Wget2: gnu wget2: memory corruption and crash via filename sanitization logic with attacker-controlled urls","id":"CVE-2025-69195"},"products":["fastmcp"],"published":"2026-03-16","related":[{"cvss_score":10,"headline":"FastMCP OpenAPI Provider has an SSRF \u0026 Path Traversal Vulnerability","id":"CVE-2026-32871","kev_date_added":null,"published":"2026-04-02"},{"cvss_score":8.2,"headline":"FastMCP: Missing Consent Verification in OAuth Proxy Callback Facilitates Confused Deputy Vulnerabilities","id":"CVE-2026-27124","kev_date_added":null,"published":"2026-04-03"},{"cvss_score":6.7,"headline":"FastMCP has a Command Injection vulnerability - Gemini CLI","id":"CVE-2025-64340","kev_date_added":null,"published":"2026-04-03"},{"cvss_score":5.4,"headline":"FastMCP vulnerable to windows command injection in FastMCP Cursor installer via server_name","id":"CVE-2025-62801","kev_date_added":null,"published":"2025-10-28"},{"cvss_score":5.3,"headline":"FastMCP vulnerable to reflected XSS in client's callback page","id":"CVE-2025-62800","kev_date_added":null,"published":"2025-10-28"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CC BY 4.0","name":"PyPA Advisory Database","prefix":"PYSEC"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-07-15","vendors":["jlowin"]},"summary":"Attackers can reuse OAuth tokens across different MCP servers due to improper resource parameter handling in FastMCP.","url":"https://insights.sbomify.com/CVE-2025-69196/"}