MCP OAuth Response Exploit
Date: 2025-10
Affected: MCP OAuth Response Exploit
Attack vector: command-injection
Category: real-world
Severity: High
CVE: CVE-2025-61591
CWE: CWE-78
CVSS:  (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)

OAuth flow in untrusted MCP servers could return poisoned responses, letting attacker inject commands executed by the agent post-authentication.


Mitigations:

Architectural layers (MAESTRO):