Memory Poisoning Defense Cheatsheet for Production Agents

blaizedsouza · x · 2026-08-22

To defend against memory poisoning attacks in Agent systems, the author provides a checklist:

Core Principle: Treat every memory write as untrusted; poisoned memory equals a persistent outage.
Defense Measures:
Never write raw user text as a fact.
Require source and confidence on every insert.
Quarantine new memories before they go live.
Detect sudden contradictions against known facts.
Allow revoke and tombstone for bad entries.
Alert when write volume looks abnormal.
Pro Tip: Give memory a quarantine lane to prevent instant writes from spreading poison.

More from coding & agent