OWASP Agent Memory Guard

Why this exists

Modern AI agents persist memory across sessions. Anything written into that memory becomes a privileged input on the next turn. An attacker who plants text in the wrong field can override instructions, exfiltrate data, or hijack tool calls — and the attack survives context resets, because the memory does.

Existing defenses run on user input at the front of the loop. Memory poisoning runs on memory itself. Different surface, different problem.

Agent Memory Guard sits between the agent and its memory store, screening every operation through a pipeline of detectors and a declarative policy.