CVE-2025-49596
MCP Inspector proxy server lacks authentication between the Inspector client and proxy
EPSS 2.6%
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]>
How to fix CVE-2025-49596
To remediate CVE-2025-49596, upgrade the affected package to a fixed version below.
- npm/@modelcontextprotocol/inspector—upgrade to 0.14.1 or later
Is CVE-2025-49596 being exploited?
Low — EPSS is 2.6%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 0.14.1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | 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 |