CVE-2025-49596

MCP Inspector proxy server lacks authentication between the Inspector client and proxy

Published 13 Jun 2025Modified 17 Jun 2026CWE 306

In the Trivy database since at least 24 Oct 2026, 07:11 UTCWhen it arrived before that build is not recorded.

Severity by source

GHSA9.4CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

Trivy's own label is CRITICAL. Rated critical by GHSA.

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.

Affected packages and fixed versions

Source	Package	Fixed in
npm::GitHub Security Advisory npm	@modelcontextprotocol/inspector	0.14.1

References

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Inside your cluster, without you opening a spreadsheet.

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RecordsEach decision is recorded with the policy that ran and its hash, then sealed under a signed checkpoint.

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