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Mar 27, 2026 12:00 PM

What's Going On With Palo Alto Networks Shares On Friday?

Palo Alto Networks, Inc. (NASDAQ:PANW) shares tumbled on Friday on reports that AI startup Anthropic inadvertently exposed internal data.

• Palo Alto Networks shares are sliding. Why is PANW stock falling?

Significant Security Lapse at Anthropic

The lapse allegedly revealed details of an unreleased model, "Claude Mythos," and an invite-only CEO retreat.

Anthropic reportedly left nearly 3,000 assets accessible via its content management system (CMS). 

The company attributed the incident to "human error in the CMS configuration." A spokesperson told Fortune the issue was "unrelated to Claude, Cowork, or any Anthropic AI tools."

Key Events: Palo Alto Networks

This week, Palo Alto Networks disclosed Prisma AIRS 3.0, positioning it as a single platform that delivers end-to-end discovery, risk assessment and protection "across the agentic lifecycle." The company also emphasizes that Prisma AIRS is designed to cover "primary threats and risks" tied to AI applications and autonomous agents, aiming to consolidate tooling into one platform rather than multiple point products.

Palo Alto Networks also unveiled "the industry's most secure browser built for agentic AI," positioning the new Prisma Browser as a way to bring secure, AI-driven work directly to end users. The announcement is tied to the company's Prisma SASE platform and is presented as a response to the "agentic AI era," with messaging centered on secure access ...