The original title is: "ANSI escape injection in MCP servers: Hidden from humans, visible to AI"

Short summary

A Hacker News discussion highlights a security vulnerability where ANSI escape sequences embedded in MCP server outputs are invisible to human reviewers but fully visible to AI models. This creates an attack surface for hidden prompt injection through tool responses. The post body is minimal, pointing to an external discussion.

• •ANSI escape codes in MCP server outputs can hide content from humans while AI models still parse it
• •This enables a novel prompt-injection vector through tool/agent integrations
• •Post body is thin — essentially a link to HN comments with no original analysis

Generated with AI, which can make mistakes.