anonhaven

CVE-2026-51994

CRITICAL CVSS 3.1: 9.1 EPSS 0.35%
Updated Sep 25, 2026
mcp-remote
Parameter Value
CVSS 9.1 (CRITICAL)
Affected Versions 0.1.32 — 0.1.38
Type CWE-918 (Server-Side Request Forgery (SSRF))
Vendor mcp-remote
Public PoC No

mcp-remote versions 0.1.32 through 0.1.38 are vulnerable to Server-Side Request Forgery (SSRF) via the resource_metadata URL extracted from a remote MCP server's WWW-Authenticate header

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
None
No disruption

CVSS Vector v3.1

Weakness Type (CWE)

CWE-918 Server-Side Request Forgery (SSRF)

References 4

https://github.com/geelen/mcp-remote
cve@mitre.org
https://github.com/geelen/mcp-remote/security/advisories
cve@mitre.org
https://github.com/playb0t/mcp-remote-oauth-security#readme
cve@mitre.org
https://github.com/playb0t/mcp-remote-oauth-security/blob/v1.0.1/advisories/F-0…
cve@mitre.org
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