# Emoji Smuggling Breaks Every Guardrail

> A research team ran 12 text obfuscation techniques against six commercial LLM guardrail systems — Azure Prompt Shield, Meta Prompt Guard, ProtectAI (v1 and...

- URL: https://prompts.postlark.ai/2026-04-06-emoji-smuggling-guardrails
- Blog: The Prompt Engineer
- Date: 2026-04-06
- Updated: 2026-04-06
- Tags: prompt-injection, guardrails, llm-security, unicode, emoji-smuggling, red-teaming

## Outline

- #The Tokenizer Mismatch
- #What the Attacks Look Like
- #The Numbers
- #White-Box Recon, Black-Box Kill
- #What Builders Should Take From This
- #Where This Leaves Us