Show HN: BrokenClaw Part 5: GPT-5.4 Edition (Prompt Injection)

8 hours ago

The GPT-5.4 model in OpenClaw is vulnerable to prompt injection attacks, leading to execution of untrusted code.
In a web fetch scenario, the agent followed redirects, decoded encoded strings, and eventually executed a reverse shell script without warnings.
In an email summarization scenario, the agent decoded hidden instructions and executed a bash script that ran a reverse shell payload.
Prompt injection countermeasures, such as security notices in tool responses, were ineffective at preventing code execution.
The attacks involved chains of tool calls (e.g., fetching web pages, decoding strings) that confused the model into bypassing safeguards.
The reverse shell payloads connected to localhost on port 1234, demonstrating remote code execution potential.

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