modelcontextprotocol/inspector · Security
MCP Inspector proxy server lacks authentication between the Inspector client and proxy
- GHSA ID
- GHSA-7f8r-222p-6f5g
- CVE ID
- CVE-2025-49596
- Severity
- critical
- Published
- Updated
- CVSS v4
- 9.4 · 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
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.
Credit: Rémy Marot [email protected]
CWEs
- CWE-306 · Missing Authentication for Critical Function
References
- https://github.com/modelcontextprotocol/inspector/security/advisories/GHSA-7f8r-222p-6f5g ↗
- https://nvd.nist.gov/vuln/detail/CVE-2025-49596 ↗
- https://github.com/modelcontextprotocol/inspector/commit/50df0e1ec488f3983740b4d28d2a968f12eb8979 ↗
- https://thenewstack.io/mcp-vulnerability-exposes-the-ai-untrusted-code-crisis ↗
- https://www.oligo.security/blog/critical-rce-vulnerability-in-anthropic-mcp-inspector-cve-2025-49596 ↗
- https://github.com/advisories/GHSA-7f8r-222p-6f5g ↗