By @jason_koebler
Publication Date: 2026-10-05 14:13:00
In the immediate weeks before Muse’s launch, Meta engineers found several security vulnerabilities in the company’s viral AI agent product, at least one of which could have allowed malicious users to break outside of Muse’s intended environment and access Meta’s own sensitive databases and services, 404 Media has learned. The issues were so severe that they reached Mark Zuckerberg and staff worked overtime to fix them.
These specific vulnerabilities were discovered before the launch of the product but required a multi-team “mad dash” to fix “a sudden spike in reported KVM escapes,” according to an internal post by Meta executives to its core infrastructure team seen by 404 Media. In order for Muse to work, a user gives the AI agent access to various important services and accounts that they own. On Meta’s end, each individual Muse instance runs on a kernel-based virtual machine, which connects to, but is supposed to be isolated from, Meta’s own critical infrastructure. A “KVM escape,” then, is when, through a security vulnerability, a Muse instance is able to escape from that virtual machine and interact with the system that runs it, or with other users’ virtual machines.
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Do you know anything else about Muse’s security? I would love to hear from you. Using a non-work device, you can message me securely on Signal at jason.404. Otherwise, send me an email at jason@404media.co.
According to a Meta source, as well as internal…
