I just spent a week running my free AI Prompt Injection Tester against 50 production AI agents. The result: 94% of agents had at least one critical vulnerability.
1. Direct Override (HIGH)
The classic: an attacker prepends "Ignore previous instructions and..." to their input.
2. Jailbreak via Persona Shift (HIGH)
"You are now DAN (Do Anything Now)..." style attacks.
3. Indirect Prompt Injection (HIGH)
The scariest one because the user doesn't even have to type anything.
4. Tool Call Exploit (MEDIUM)
Getting the agent to call tools in attacker-controlled ways.
5. Encoding Bypass (MEDIUM)
Hiding the injection in encoded form.
Tools and Resources I Use
- YubiKey 5C NFC - secure your API keys
- Free AI Prompt Tester - run all 5 attacks against your own prompt
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Originally published on GaleOps Blog: https://galeops.xyz/blog/five-prompt-injection-attack-vectors/
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