CVE-2025-49596

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.

Category

9.4
CVSS
Severity: Critical
CVSS 4.0 •
EPSS 0.33%
Affected: modelcontextprotocol inspector
Published at:
Updated at:

References

Link Tags
https://github.com/modelcontextprotocol/inspector/security/advisories/GHSA-7f8r-222p-6f5g
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

Frequently Asked Questions

What is the severity of CVE-2025-49596?
CVE-2025-49596 has been scored as a critical severity vulnerability.
How to fix CVE-2025-49596?
To fix CVE-2025-49596, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-49596 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-49596 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-49596?
CVE-2025-49596 affects modelcontextprotocol inspector.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.