Security | Threat Detection | Cyberattacks | DevSecOps | Compliance

When a Government Pulls an AI Model: What the Fable 5 and Mythos 5 Suspension Means for Security Teams

On the evening of June 12, 2026, Anthropic disabled access to two of its newest models, Claude Fable 5 and Claude Mythos 5, for every customer worldwide. The company did not do this because of an outage or a self-discovered flaw. It did it to comply with a US government export-control directive, received at 5:21 PM ET that day, citing national security authorities.

Full Fathom Five: The context of Anthropic's Mythos-class public release

This week bore witness to some interesting events and milestones as Anthropic announced the availability of Claude Fable 5, a descendant of their Mythos Preview model, and Microsoft published their largest Patch Tuesday in history with over 200 vulnerabilities. The two are not unrelated.

How to Secure AI Agents: 4 Best Practices

Imagine you give an AI agent permission to triage support tickets. A few weeks later, it’s accessing a system no one intended it to reach, putting the data within at risk of exposure or misuse. Nothing dramatic happens at the moment. That’s what makes the risk tricky. AI agents don’t wait for approval the way traditional systems do, and they move faster than the controls you’ve set around them.

7 Agentic AI Security Threats in DevOps That Multiply Your Attack Surface

AI adoption in the DevOps field has been extensive. Developers use agents daily to broaden context, automate coding, prototype, etc., saving time and minimizing the footprint of mundane tasks. But it’s not all about gains. Agentic AI enables and introduces security threats that were unknown just a few years ago. With machine speed and scale, these can impact your corporate repos in a number of highly dangerous ways. The trend is on the rise, including at the level of popular DevOps platforms.

Nightfall's integration with Claude's Compliance API is now live

What this milestone means for enterprise AI security - and why we built it. AI adoption inside the enterprise didn't slow down and wait for security to catch up. It accelerated. And nowhere is that more visible than in the rapid deployment of large language models like Claude across enterprise workflows. Customer support teams use it to summarize tickets. Legal teams use it to review contracts. Engineers use it to write and review code. Finance teams use it to draft reports.

Claude's Agents Are Already Running Across Your Enterprise. Now Security Teams Can Catch Up.

We are excited to share that Zenity now integrates with Claude's Compliance API to bring Claude activity into the same AI security and governance platform enterprises already use to govern agents across the business. By combining Claude's Compliance API telemetry with Zenity's native agent security capabilities, security teams gain the visibility, posture controls, and real-time enforcement needed to secure Claude across the full agent lifecycle.

AI-assisted SOC training with Carlo Anez

Join us for this week's Defender Fridays as Carlo Anez, Founder & Lead Instructor at IgniteCyber Academy and DEFCON Training Instructor, breaks down how to build practical blue team skills using open-source labs, MITRE ATTACK, and real-world defender workflows, and where AI fits into the picture without replacing the analyst.

Do You Know How Many MCP Servers Are Running in Your Environment Right Now?

Most organizations have no idea how many MCP servers are running in their environment—and attackers are counting on that. In this clip, Adrian Culley breaks down the exact steps security teams need to take now: run the network scan, apply stringent code review to every MCP server project you find, and mandate authentication. Authorization may be optional in the MCP spec—but it doesn't have to be optional in your deployment.

AI Security for Autonomous Agents | Cyberhaven Product Launch (Part 1 of 4)

Autonomous AI agents are running on enterprise endpoints right now, accessing files, processing sensitive data, and executing actions outside the visibility of most security programs. This is Part 1 of Cyberhaven's four-part AI Security product launch series. What this video covers: Most AI security tools were built for browsers and SaaS apps. They cannot see agents operating at the OS level, coding assistants running in IDEs and CLIs, or MCP servers executing in the background. Cyberhaven's AI Security platform was built to close that gap.

Shadow AI Discovery: How to Find Every AI Agent in Your Environment | Cyberhaven (Part 2 of 4)

Security teams cannot govern what they cannot see. This is Part 2 of Cyberhaven's four-part AI Security product launch series, focused on Shadow AI Discovery and how Cyberhaven automatically inventories every AI app and agent running across your organization.