I’ve had a bunch of people ask my thoughts on Anthropic’s Mythos. I’ve read the research paper they released and the numbers, and basically I agree with @malwaretech’s take. It’s marketing. The cybersecurity industry is historically very good at marketing cyber pearl harbour and the need to buy magic boxes.
Is Cybersecurity Over?

YouTube

I don't think anybody actually watches videos any more, so here's MWT's core point -

The flagship and lead vuln in the research is a BSD vuln, it cost $20k to discover with Mythos. Anthropic only reached a crash, and the vuln class in 99%+ cases never reaches RCE, just crashes.

So.. cool.. you spent $20k of VC money to find a crash as the flagship vuln. But... uhm... that isn't the end of the world.

The proof is going to be if any of the open source vulns turn out to be important. So far:

Anthropic set the project across open source projects and provided access and reported the vulns. Typically, you'd expect to see NCSCs spinning up advisories to patch high impact vulns, CISA telling orgs to patch etc etc etc.

What's actually happening is... uhm... a whole heap of nothing but people copy and pasting marketing about how cybersecurity is over.

It's not though, is it?

@GossiTheDog They aren't claiming it's over, that's a strawman. But interestingly they are providing commit hashes of things they've found. Some of these are seriously scary. I've saved a copy of the webpage and will be waiting to see if the promised commits turn up. If they do check out my opinion of Anthropic will rise. If not...
@trademark @GossiTheDog What does "commit hashes of things they've found" even mean? No non-slop project is going to merge the same commits they used in their fixes, because they're LLM slop without provenance to license. If any of these are real, the upstream will fix the bug properly in a way the actual people working on the project understand and can document.
@dalias @trademark @GossiTheDog the hashes are of advisories they claim they will publish in the future afaik, not patches.
@dalias @trademark @GossiTheDog so easily verifiable if they actually turn up but the hype cycle will have moved on by then and they already got the PR benefit of claiming a huge number of bugs
@azonenberg @dalias @GossiTheDog I think it will be a big deal if they don't keep their promises. It's the sort of thing journalists will use for attack pieces. We do already know that some of the bugs are real, for instance Anthropic is keeping the exploit for CVE-2026-4747 secret, but somebody else used public version of Claude to create their own working exploit: https://blog.calif.io/p/mad-bugs-claude-wrote-a-full-freebsd
MAD Bugs: Claude Wrote a Full FreeBSD Remote Kernel RCE with Root Shell (CVE-2026-4747)

To our knowledge, this is the first remote kernel exploit both discovered and exploited by an AI.

Calif

@trademark @azonenberg @GossiTheDog I love how they hype what's a vuln in the in-kernel NFS server (FFS we've been doing this shit at least 2/3 of my lifetime, stop doing NFS/sunrpc shit already) as "FreeBSD RCE".

I knew when I was like 15 that you don't run NFS unless you want to get popped.

@dalias @azonenberg @GossiTheDog To summarize your position: "If Anthropic witholds something to give defenders time to fix it, it means they're lying and have nothing. When they do release a real bug it means that it was for some stupid thing you shouldn't be running anyway." Got it.

@trademark @azonenberg @GossiTheDog Huh? Did your LLM just vomit that? Because it's completely unrelated to what I said.

What I said is that they're hyping a vuln in one small thing, an NFS server, that FreeBSD happens to have a version of that runs in kernelspace, that nobody security-conscious would be using to begin with, and calling it "vuln in FreeBSD!" to make it sound important and impressive.

Absolutely nothing to do with disclosure timeines or whether their findings are real.

@dalias @trademark @azonenberg @GossiTheDog NFS-Ganesha is the userspace server the industry came up with specifically to not run an NFS server in kernelspace anymore.

It still sucks but at least it doesn't compromise the kernel and can actually be run with limited permissions.