CVE-2025-49596: MCP Inspector Authentication Bypass and RCE
MCP Inspector
MCP Inspector proxy servers lack authentication between the client and proxy, leading to remote code execution. Unauthenticated requests can launch MCP commands over stdio.
disclosed CVENo confirmed exploitation, so this record is tracked as a disclosed vulnerability and not counted as an incident. It moves into the counts if CISA or the vendor confirms exploitation. Why
- CVSS
- 9.4
- EPSS
- 0.40 · top 2% · 2026-11-13
- fix status
- Fix status unknown
- first report
- 13 Jun 2025
- last update
- 13 Jun 2025
- CVE ids
Timeline · 1
Sources · 1
Advisories and databases
- 2025-06-13CVE-2025-49596: MCP Inspector proxy server lacks authentication between the Inspector client and proxyGitHub Advisory Database · github.com/advisories/GHSA-7f8r-222p-6f5g
Titles and links belong to their publishers. The summary above is written by gcdRadar in its own words; data is CC BY-SA 4.0.
Classification
- lane
- Patch now
- AI role
- Attack on AI
- categories
- Infrastructure vulnerability
- severity
- 2 · Disclosed vulnerability
- fix status
- Fix status unknown
- targets
- Framework / tooling
- owasp llm top 10
- LLM03:2025 Supply Chain
- mitre atlas
- no technique for these categories
- dates
- happened 13 Jun 2025 · first reported 13 Jun 2025
- origin
- GitHub Advisory DatabaseVulnerability record from NVD / the GitHub Advisory Database. This product uses the NVD API but is not endorsed or certified by the NVD.
- record
- confidence 0.95 · created 2026-10-18 07:00Z · updated 2026-10-18 07:00Z
Lane, AI role, categories and severity come from the classifier; the OWASP and ATLAS rows are derived from the categories. How these are assigned
Copy a brief
This record as a short Markdown brief, for a ticket, a chat or a coding agent.
the brief as text
# CVE-2025-49596: MCP Inspector Authentication Bypass and RCE https://gcdradar.vercel.app/incidents/cve-2025-49596-mcp-inspector-authentication-bypass-and-rce · AIR-2025-0296 · closed 2025-06-13 - Lane: Patch now - Severity: 2 (Disclosed vulnerability) - Fix status: Fix status unknown - First reported: 2025-06-13 - AI role: Attack on AI - Products: MCP Inspector - CVE ids: CVE-2025-49596 - CVSS: 9.4 ## Summary MCP Inspector proxy servers lack authentication between the client and proxy, leading to remote code execution. Unauthenticated requests can launch MCP commands over stdio. ## What to do No action recorded; read the sources below and the vendor's advisory. ## Latest updates - 2025-06-13: CVE-2025-49596: MCP Inspector proxy server lacks authentication between the Inspector client and proxy (https://github.com/advisories/GHSA-7f8r-222p-6f5g) ## Sources - 2025-06-13 GitHub Advisory Database: CVE-2025-49596: MCP Inspector proxy server lacks authentication between the Inspector client and proxy https://github.com/advisories/GHSA-7f8r-222p-6f5g Verify against the vendor's advisory before changing production. Data CC BY-SA 4.0, https://gcdradar.vercel.app.
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