Meta Muse: When Your AI Assistant Becomes the Attack Surface
Show notes
Meta Muse is designed to work across a user’s inbox, calendar, browser, connected apps, and other personal services. That makes it useful—and makes its delegated authority a security problem worth examining.
Tom Eston and Scott Wright discuss Meta’s stated guardrails for Muse, including isolated execution, connector separation, credential boundaries, and approval flows. They also examine reporting on a Muse authentication-token issue and why a compromised token can matter more when an agent is authorized to act across a person’s digital life.
The conversation also covers privacy expectations, reports of human involvement behind AI tasks, liability when an agent makes a harmful decision, and how digital-legacy planning changes when an agent could continue acting after its owner is inactive. The practical takeaway: start with least privilege, separate read from write and spending authority, approve consequential actions, review logs, and keep a fast way to revoke access.
** Links mentioned on the show **
Ars Technica — Muse, Meta’s extraordinarily privileged AI assistant, has a serious 0-day https://arstechnica.com/security/2026/09/muse-metas-extraordinarily-privileged-ai-assistant-has-a-serious-0-day/
Meta AI Research — How We Built Safety Into Muse https://research.meta.ai/blog/security-and-safety-for-ai-agents-our-approach-with-muse
Meta Help Center — How Muse handles your privacy, safety and security https://www.meta.com/help/artificial-intelligence/1047255454427887/
CNBC — Meta pushes into personal AI agents in Muse Spark family https://www.cnbc.com/2026/09/08/meta-personal-ai-agents-public-reckoning-privacy-safety.html
WIRED — Meta Releases Muse, a Personal AI Agent With Privacy Built Into It https://www.wired.com/story/meta-releases-muse-a-personal-ai-agent-with-privacy-built-into-it/
The Guardian — Meta’s AI agent Muse gives out user’s home address without permission https://www.theguardian.com/technology/2026/sep/28/metas-ai-agent-muse-home-address
404 Media — Humans Reading Copilot Prompts and Images https://www.404media.co/humans-reading-copilot-prompts-images/
Scott Wright’s Digital Legacy Network LinkedIn group https://www.linkedin.com/groups/39988004
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Special thanks to Guardsquare for sponsoring this episode! Guardsquare is the leader in mobile application security, with multi-layered protection for your Android and iOS apps. Learn more at Guardsquare.com.