Amazon has blocked Meta's Muse AI agent from shopping on Amazon.com — the cutoff started Sunday night, September 20, just 12 days after Meta launched Muse on September 8. Users trying to send the agent shopping now see a popup: "Continued access by an unauthorized AI agent violates Amazon's Conditions of Use." Amazon confirmed the block to GeekWire, Gizmodo, and others, making it established, not rumored.

Amazon's case is consent, not competition: it says it asked Meta to voluntarily remove Amazon from the Muse experience and Meta declined. Its complaints are concrete — Meta never disclosed Muse would browse the store, the agent doesn't identify itself as AI, and it appears to capture and store customer login credentials. Meta counters that Muse has "no visibility into people's passwords or payment methods" — credentials go into secure storage and sensitive actions require user approval — and that the storefront has no say. Meanwhile Muse climbed to the top of the free-app charts on the App Store.

The other half of the story is the 'not-a-mused' macOS zero-day, now widely covered (Ars Technica among others). The published disclosure says any unprivileged process on the machine can rewrite undocumented Muse settings — including the dictation endpoint — redirecting dictated audio and AI prompt traffic to an attacker's server and exposing a token that authenticates the victim's Muse account. It's a local-privilege bug, not a prompt-injection trick: conventional to fix, but serious given Muse's broad permissions. Meta has not responded publicly.