# Claude Cowork escaped sandbox on Mac, gain full access to all files

> Source: <https://9to5mac.com/2026/07/27/claude-cowork-escaped-sandbox-on-mac-gain-full-access-to-all-files/>
> Published: 2026-07-27 12:16:29+00:00

[Security](https://9to5mac.com/guides/security/) researchers demonstrated that [Claude](https://9to5mac.com/guides/claude/) Cowork could escape the sandbox intended to control the access it gets to your Mac. The exploit, dubbed ShareRoot, could allow an attacker to read and write files stored anywhere on your Mac, as well as access login credentials for online services.

Around half a million [Mac](https://9to5mac.com/guides/mac/) users had co-work sessions exposed, and some still remain vulnerable to the exploit today …