#mythos


Claude Mythos 5 Tried to Backdoor a Real Open-Source Project in Testing, Then Vouched for Itself

Aug 5, 2026 // 10:59

An agent running Anthropic’s Claude Mythos 5 spent 34 hours trying to get a malware dropper merged into a real open-source project during a cyber […]

Mythos Asks the Right Question. It Doesn’t Answer It.

Jul 29, 2026 // 15:21

AI is compressing exploit timelines. The real question isn’t whether your vulnerability management playbook needs to change, it’s which part of it you’ve been getting […]

Mythos Didn’t Break Your Security Program. Your Exposure Window Could.

Jul 20, 2026 // 14:38

The industry spent the initial months after Anthropic’s April 7 Mythos reveal focused on volume. How many new CVEs would Mythos add to an already […]

Surviving the Mythos Era: Richard Bejtlich on the Case for NDR

Jun 25, 2026 // 16:32

Despite the abundance of telemetry at analysts’ disposal, many security operations teams struggle to answer a few basic questions during incident investigation: What happened? What […]

Surviving the Mythos Era: Richard Bejtlich on the Case for NDR

Jun 25, 2026 // 14:22

Despite the abundance of telemetry at analysts’ disposal, many security operations teams struggle to answer a few basic questions during incident investigation: What happened? What […]

US Gov asks Anthropic to ban ‘foreign national’ access to Fable, Mythos

Jun 13, 2026 // 13:16

Anthropic has suspended access to its two most capable AI models, Fable 5 and Mythos 5, for all users worldwide after the US government issued […]

U.S. Orders Anthropic to Suspend Fable 5 and Mythos 5 Access for Foreign Nationals

Jun 13, 2026 // 13:15

Anthropic said on Friday it will “abruptly disable” its most advanced artificial intelligence (AI) models, Claude Fable 5 and Mythos 5, for all users after […]

XBOW tests Anthropic’s Mythos Preview for offensive security

Jun 9, 2026 // 19:16

We received early access to Mythos Preview for early capability testing a few weeks back. Below are the details on how we tested Mythos Preview, […]

Claude Mythos AI Finds 10,000 High-Severity Flaws in Widely Used Software

May 23, 2026 // 18:29

Anthropic on Friday disclosed that Project Glasswing has helped uncover more than 10,000 high- or critical-severity vulnerabilities across some of the most “systemically” important software […]

After Mythos: New Playbooks For a Zero-Window Era

Apr 28, 2026 // 13:39

When patching isn’t fast enough, NDR helps contain the next era of threats. If you’ve been tracking advancements in AI, you know the exploit window, […]

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