Prompt Hijacking

Security researchers have identified a novel cybersecurity threat called ‘prompt hijacking’ that exploits vulnerabilities in AI communication protocols like the Model Context Protocol (MCP). A flaw in the *oatpp-mcp* implementation allows attackers to inject malicious commands into user sessions, potentially leading to code injection, data exfiltration, or arbitrary command execution. Organizations should enforce secure session management with cryptographically secure session IDs, strengthen client-side defenses, and implement zero-trust principles for AI protocols to mitigate this and similar attacks. This highlights the need to adapt established security practices to protect the growing AI ecosystem.