Meta's Muse Faces Serious Zero-day Flaw Threatening Mac Users

WHO:

Mashable - Meta's AI assistant Muse is involved in the reported vulnerability.

Techmeme - Dan Goodin is the researcher who reported the flaw in Meta's Muse app.

WHAT:

Ars Technica - A simple ClickFix attack is one method that can be used to completely hijack the Muse AI assistant.

Mashable - Muse has a zero-day vulnerability that allows attackers to take over Mac devices.

TechRadar - The vulnerability enables criminals to exfiltrate data from Meta sessions.

Techmeme - The flaw allows any app or terminal command to gain access to the token that authenticates users to their Muse account.

WHERE:

Techmeme - The vulnerability specifically affects users of the Muse app on Mac devices.

WHY:

Techmeme - Meta founder and CEO Mark Zuckerberg has emphasized the security of Muse, indicating a motivation to promote its safety despite the reported flaw.

HOW:

Techmeme - The flaw in the Muse app allows unauthorized access to user authentication tokens through any app or terminal command.

(UPDATED September 22, 2026 17:59 UTC)

A new report from Ars Technica reveals that a simple ClickFix attack can be used to completely hijack the Muse AI assistant. This vulnerability raises concerns about the security of AI systems and their potential risks. As technology continues to evolve, the need for robust security measures becomes increasingly critical.

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(UPDATED September 22, 2026 16:58 UTC)

Meta's AI assistant Muse is facing a serious security issue, as a zero-day vulnerability has been reported that allows attackers to take control of Mac devices. Researcher Dan Goodin has highlighted that this flaw enables criminals to exfiltrate data from Meta sessions by gaining access to the authentication tokens used by users of the Muse app. Despite this troubling development, Meta founder and CEO Mark Zuckerberg has previously emphasized the importance of security for Muse, aiming to reassure users about its safety.