---
id: 8891
title: "cat readme.txt\" is not safe in iTerm2"
source_domain: calif.io
source_url: "https://calif.io/research/iterm2"
published_at: "2026-04-17T00:00:00Z"
tags: ["vulnerability-research", "macos", "terminal-security", "iterm2", "madbugs", "escape-sequence"]
phying_url: "https://phying.com/item/8891"
lang: en
---

# cat readme.txt" is not safe in iTerm2

## Summary

# "cat readme.txt" is not safe in iTerm2 Codex found a bug turning "cat readme.txt" into arbitrary code execution. Hung Nguyen April 17, 2026 Covered by Hacker News madbugs Contents 1. Background:...

## Intelligence Metadata

- **Sources:** calif.io
- **Published:** 2026-04-17T00:00:00Z
- **Original:** https://calif.io/research/iterm2
- **Phying News:** https://phying.com/item/8891