CVE-2025-49596

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.

CVSS v4.0

9.4 CRITICALCVSS: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

CVSS v4.0

9.4 CRITICALCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

EPSS

44.71% chance of exploitation in the next 30 days, 99th percentile

Nuclei

critical · CWE-306

Published

2025-06-13

Updated

2025-07-09

Proof-of-concept exploits (3)

• ashiqrehan-21/MCP-Inspector-CVE-2025-495960★ · 2025-07-03
• pppxo/CVE-2025-49596-PoC0★ · 2026-03-26
• Acczdy/CVE-Vault

Nuclei templates (1)

• projectdiscovery/nuclei-templates/blob/main/http/cves/2025/CVE-2025-49596.yaml

References

• CVE Record
• NVD entry

Related

• CVE-2025-9074
• CVE-2026-23744
• CVE-2022-24112
• CVE-2023-1313
• CVE-2023-32315
• CVE-2025-1040