{"id":"CVE-2025-49596","aliases":["EUVD-2025-20870","GHSA-7f8r-222p-6f5g","ROOT-APP-NPM-CVE-2025-49596"],"status":"published","title":"MCP Inspector proxy server lacks authentication between the Inspector client and proxy","description":"The MCP inspector is a developer tool for testing and debugging MCP servers. Versions of MCP Inspector below 0.14.1 are vulnerable to remote code execution due to lack of authentication between the Inspector client and proxy, allowing unauthenticated requests to launch MCP commands over stdio. Users should immediately upgrade to version 0.14.1 or later to address these vulnerabilities.","severity":{"version":"4.0","score":9.4,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-08","score":0.44453,"percentile":0.98772,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":true},"cwes":["CWE-306"],"published":"2025-06-13T20:11:40Z","modified":"2026-10-28T02:30:53Z","exploits":[{"source":"nuclei","id":"CVE-2025-49596","title":"MCP Inspector \u003c 0.14.0 UnauthenticatedRemote Code Execution","type":"detection template","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2025/CVE-2025-49596.yaml"},{"source":"pocgithub","id":"RajSidwadkar/UAP-protocol","title":"RajSidwadkar/UAP-protocol","date":"2026-06-06","url":"https://github.com/RajSidwadkar/UAP-protocol"},{"source":"pocgithub","id":"acseguin21/trust-boundary-ctf","title":"acseguin21/trust-boundary-ctf","date":"2026-04-10","url":"https://github.com/acseguin21/trust-boundary-ctf"},{"source":"pocgithub","id":"ashiqrehan-21/MCP-Inspector-CVE-2025-49596","title":"ashiqrehan-21/MCP-Inspector-CVE-2025-49596","date":"2025-07-03","url":"https://github.com/ashiqrehan-21/MCP-Inspector-CVE-2025-49596"},{"source":"pocgithub","id":"pppxo/CVE-2025-49596-PoC","title":"pppxo/CVE-2025-49596-PoC","date":"2026-03-25","url":"https://github.com/pppxo/CVE-2025-49596-PoC"}],"fixes":[{"ecosystem":"npm","package":"@modelcontextprotocol/inspector","fixed_in":["0.14.1"],"sources":["ghsa","osv"]},{"ecosystem":"Root:npm","package":"@rootio/modelcontextprotocol__inspector","fixed_in":["0.4.1-root.io.1","0.4.1-root.io.2","0.4.1-root.io.3"],"sources":["osv"]},{"ecosystem":"Root:npm","package":"@modelcontextprotocol/inspector","fixed_in":["0.4.1-aikido.3"],"sources":["osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"@modelcontextprotocol/inspector","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.14.1"}]}]},{"source":"osv","ecosystem":"npm","package":"@modelcontextprotocol/inspector","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.14.1"}]}]},{"source":"osv","ecosystem":"Root:npm","package":"@rootio/modelcontextprotocol__inspector","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.4.1-root.io.1"},{"fixed":"0.4.1-root.io.2"},{"fixed":"0.4.1-root.io.3"}]}]},{"source":"osv","ecosystem":"Root:npm","package":"@modelcontextprotocol/inspector","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.4.1-aikido.3"}]}]}],"products":[{"vendor":"mcpjam","product":"inspector"},{"vendor":"modelcontextprotocol","product":"inspector"}],"references":[{"url":"https://github.com/modelcontextprotocol/inspector/security/advisories/GHSA-7f8r-222p-6f5g","tags":["x_refsource_CONFIRM","advisory","web"]},{"url":"https://github.com/modelcontextprotocol/inspector/commit/50df0e1ec488f3983740b4d28d2a968f12eb8979","tags":["x_refsource_MISC","fix","web"]},{"url":"https://thenewstack.io/mcp-vulnerability-exposes-the-ai-untrusted-code-crisis","tags":["x_refsource_MISC","web"]},{"url":"https://www.oligo.security/blog/critical-rce-vulnerability-in-anthropic-mcp-inspector-cve-2025-49596","tags":["x_refsource_MISC","article","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-49596","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-7f8r-222p-6f5g"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/49xxx/CVE-2025-49596.json","tags":["advisory"]},{"url":"https://github.com/modelcontextprotocol/inspector","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2025-49596","title":"MCP Inspector proxy server lacks authentication between the Inspector client and proxy","description":"The MCP inspector is a developer tool for testing and debugging MCP servers. Versions of MCP Inspector below 0.14.1 are vulnerable to remote code execution due to lack of authentication between the Inspector client and proxy, allowing unauthenticated requests to launch MCP commands over stdio. Users should immediately upgrade to version 0.14.1 or later to address these vulnerabilities.","status":"published","published":"2025-06-13T20:11:40.453Z","modified":"2025-07-09T20:19:02.667Z","cvss":[{"version":"4.0","score":9.4,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H","level":"critical","assessor":"cna"}],"cwes":["CWE-306"],"updated_at":"2026-11-02T14:32:24.825718Z"}],"euvd":[{"id":"EUVD-2025-20870","description":"The MCP inspector is a developer tool for testing and debugging MCP servers. Versions of MCP Inspector below 0.14.1 are vulnerable to remote code execution due to lack of authentication between the Inspector client and proxy, allowing unauthenticated requests to launch MCP commands over stdio. Users should immediately upgrade to version 0.14.1 or later to address these vulnerabilities.","status":"published","published":"2025-06-13T20:11:40Z","modified":"2025-07-09T20:19:02Z","cvss":[{"version":"4.0","score":9.4,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H","level":"critical"}],"updated_at":"2026-11-02T20:32:10.118111Z"}],"ghsa":[{"id":"GHSA-7f8r-222p-6f5g","title":"MCP Inspector proxy server lacks authentication between the Inspector client and proxy","description":"Versions of MCP Inspector below 0.14.1 are vulnerable to remote code execution due to lack of authentication between the Inspector client and proxy, allowing unauthenticated requests to launch MCP commands over stdio. Users should immediately upgrade to version 0.14.1 or later to address these vulnerabilities.\n\nCredit: Rémy Marot \u003cbughunters@tenable.com\u003e","status":"published","published":"2025-06-13T22:15:26Z","modified":"2025-07-09T20:18:38Z","cvss":[{"version":"4.0","score":9.4,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H","level":"critical"}],"cwes":["CWE-306"],"updated_at":"2026-11-02T14:38:49.837727Z"}],"nvd":[{"id":"CVE-2025-49596","description":"The MCP inspector is a developer tool for testing and debugging MCP servers. Versions of MCP Inspector below 0.14.1 are vulnerable to remote code execution due to lack of authentication between the Inspector client and proxy, allowing unauthenticated requests to launch MCP commands over stdio. Users should immediately upgrade to version 0.14.1 or later to address these vulnerabilities.","status":"published","published":"2025-06-13T20:15:23.133Z","modified":"2026-06-17T09:31:33.567Z","cvss":[{"version":"4.0","score":9.4,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"critical","assessor":"secondary"}],"cwes":["CWE-306"],"updated_at":"2026-11-02T14:11:11.789448Z"}],"osv":[{"id":"CVE-2025-49596","title":"MCP Inspector proxy server lacks authentication between the Inspector client and proxy","description":"The MCP inspector is a developer tool for testing and debugging MCP servers. Versions of MCP Inspector below 0.14.1 are vulnerable to remote code execution due to lack of authentication between the Inspector client and proxy, allowing unauthenticated requests to launch MCP commands over stdio. Users should immediately upgrade to version 0.14.1 or later to address these vulnerabilities.","status":"published","published":"2025-06-13T20:11:40.453Z","modified":"2026-10-28T02:30:53.310261618Z","cvss":[{"version":"4.0","score":9.4,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H","level":"critical"}],"cwes":["CWE-306"],"updated_at":"2026-11-02T15:44:50.037003Z"},{"id":"GHSA-7f8r-222p-6f5g","title":"MCP Inspector proxy server lacks authentication between the Inspector client and proxy","description":"Versions of MCP Inspector below 0.14.1 are vulnerable to remote code execution due to lack of authentication between the Inspector client and proxy, allowing unauthenticated requests to launch MCP commands over stdio. Users should immediately upgrade to version 0.14.1 or later to address these vulnerabilities.\n\nCredit: Rémy Marot \u003cbughunters@tenable.com\u003e","status":"published","published":"2025-06-13T22:15:26Z","modified":"2025-07-09T20:18:37Z","cvss":[{"version":"4.0","score":9.4,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H","level":"critical"}],"cwes":["CWE-306"],"updated_at":"2026-11-02T15:46:41.002603Z"},{"id":"ROOT-APP-NPM-CVE-2025-49596","title":"CVE-2025-49596 in @rootio/modelcontextprotocol__inspector - Patched by Root","description":"Root has patched CVE-2025-49596 in the @rootio/modelcontextprotocol__inspector package for Root:npm. Multiple fixed versions available.","status":"published","published":"2026-06-04T16:11:11Z","modified":"2026-06-04T19:00:15.424544828Z","updated_at":"2026-11-02T15:53:27.362922Z"}]}}