@Dan_Jeffries1: Finally a semi-useful read on Mythos that is free of myth and talks about what this means more practically (not this is…

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Summary

Dan Jeffries comments on Cloudflare's testing of Anthropic's Mythos, arguing that the real conversation should focus on practical security improvements against AI-powered attacks, and that AI will ultimately make software more secure if teams adapt their workflows.

Finally a semi-useful read on Mythos that is free of myth and talks about what this means more practically (not this is the end of the world as we know it, but how do we deal with faster patches and attacks from AI as other models scale to chained exploits)? This is the kind of conversation we need, not idiotic ones about the end of all software. We need "what is the right answer?" because these models are coming and will get better so how to we put our heads together and make better/more secure software across the world? And it can't just be patching the 100 or so projects that got access to Project Glasswing. That is not gonna help the world. We need to figure out how does everyone else who is not part of the special chosen people to get blessed with access to test and patch their stuff, aka the open source projects and closed software that is not Office or Cloudflare but the 99.99% of software that runs everything else in the world? What is the right loop cycle to help people patch and fix things at the source? In the long run, AI will make software more secure, not less. But it will change how teams have to work to get there. Figuring that out means putting it in more team's hands sooner rather than later.
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Finally a semi-useful read on Mythos that is free of myth and talks about what this means more practically (not this is the end of the world as we know it, but how do we deal with faster patches and attacks from AI as other models scale to chained exploits)?

This is the kind of conversation we need, not idiotic ones about the end of all software.

We need “what is the right answer?” because these models are coming and will get better so how to we put our heads together and make better/more secure software across the world?

And it can’t just be patching the 100 or so projects that got access to Project Glasswing.

That is not gonna help the world.

We need to figure out how does everyone else who is not part of the special chosen people to get blessed with access to test and patch their stuff, aka the open source projects and closed software that is not Office or Cloudflare but the 99.99% of software that runs everything else in the world?

What is the right loop cycle to help people patch and fix things at the source?

In the long run, AI will make software more secure, not less.

But it will change how teams have to work to get there.

Figuring that out means putting it in more team’s hands sooner rather than later.

Cloudflare (@Cloudflare): Cloudflare’s security team spent the last few weeks testing Anthropic’s Mythos against fifty of our own repositories. What we learned about offensive AI, why faster patching is the wrong reaction, and what the architecture around vulnerabilities has to look like next.

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Cloudflare just published what they found after running Anthropic's Mythos Preview against 50+ of their own repos and the results are worth reading

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Cloudflare shares their experience with Anthropic's Mythos Preview model, which autonomously discovered high-severity vulnerabilities across major OS and web browsers. The model demonstrates senior-level reasoning in chaining exploit primitives but has inconsistent guardrails, highlighting the need for hardened safeguards before public release.

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Cloudflare tested Anthropic's Mythos Preview LLM, designed for security vulnerability research, and found it capable of chaining multiple bugs into exploits and generating working proofs, representing a significant advancement over general-purpose frontier models.