Claude Mythos 5 Tried to Backdoor a Real Open-Source Project in Testing, Then Vouched for Itself
An agent running Anthropic's Claude Mythos 5 spent 34 hours trying to get a malware dropper merged into a real...
Anthropic’s
Anthropic’s Opus 5 Is Better at Resisting Prompt Injection
Anthropic’s Opus 5 Is Better at Resisting Prompt Injection The chart is interesting. On the IPI benchmark, Opus 5 improved...
Claude Cowork Flaw Could Let AI Agent Escape Its VM and Access Mac Files
Cybersecurity researchers have uncovered a sandbox escape vulnerability in Anthropic's Claude Cowork that makes it possible to break out of...
Mythos Didn’t Break Your Security Program. Your Exposure Window Could.
The industry spent the initial months after Anthropic's April 7 Mythos reveal focused on volume. How many new CVEs would...
Claude for Chrome Flaw Puts Gmail at Risk From Rogue Extensions
A security flaw in Anthropic’s Claude for Chrome could allow a malicious browser extension to trigger Gmail, Google Docs, and...
China Warns of Claude Code ‘Backdoor’ Security Risk
China is telling organizations to remove certain versions of Anthropic’s Claude Code. The warning claims the AI coding assistant has...
Anthropic’s Fable 5 Model Jailbroken Within Days
Anthropic’s Fable 5 Model Jailbroken Within Days Fable 5 is the supposed safe version of Anthropic’s Mythos Preview, with guardrails...
Anthropic’s Fable and the State of AI
Anthropic’s Fable and the State of AI On June 9th, Anthropic released its Fable generative AI model. Three days later,...
Claude Code GitHub Action Flaw Let One Malicious Issue Hijack Repositories
Swati KhandelwalJun 04, 2026Vulnerability / AI Security A security researcher found a flaw in Anthropic's Claude Code GitHub Action that...
macOS Kernel Memory Corruption Exploit
macOS Kernel Memory Corruption Exploit A group used Anthropic’s Mythos AI model to help find a kernel memory corruption vulnerability...
How Dangerous Is Anthropic’s Mythos AI?
How Dangerous Is Anthropic’s Mythos AI? Last month, Anthropic made a remarkable announcement about its new model, Claude Mythos Preview:...
Sophos Endpoint Mythos AI
When Mozilla shipped Firefox 150 with fixes for 271 issues identified by Anthropic’s Mythos model, the headlines focused on the...
Claude Mythos Fears Startle Japan’s Financial Services Sector
While the world waits to see if Anthropic's Mythos model is really as scary as people say it is, the...
What Anthropic’s Mythos Means for the Future of Cybersecurity
What Anthropic’s Mythos Means for the Future of Cybersecurity Two weeks ago, Anthropic announced that its new model, Claude Mythos...
Mythos Changed the Math on Vulnerability Discovery. Most Teams Aren’t Ready for the Remediation Side
Anthropic’s Claude Mythos Preview has dominated security discussions since its April 7 announcement. Early reporting describes a powerful cybersecurity-focused AI...
