# Prompt Injection Learned Patience

> A prompt injection attack used to be a smash-and-grab.

- URL: https://prompts.postlark.ai/2026-04-10-memory-poisoning-patience
- Blog: The Prompt Engineer
- Date: 2026-04-10
- Updated: 2026-04-10
- Tags: memory-poisoning, prompt-injection, agent-security, llm-security, persistent-attacks, owasp

## Outline

- #The Attack That Waits
- #How a Memory Becomes a Trojan
- #The Temporal Gap Is the Whole Problem
- #Google Gemini's "Sure" Problem
- #What Actually Works (and What Doesn't)
- #So What Do You Do