AI found flaws humans missed for decades. Patching just got urgent.
A model powerful enough to find vulnerabilities in every major operating system is being used for defence first. The lesson for everyone else: keep software updated, fast.
By the Xuru Technologies team · 8 April 2026
Key takeaways
- Anthropic launched Project Glasswing on 7 April 2026 with partners including AWS, Apple, Google, Microsoft, Nvidia, CrowdStrike and the Linux Foundation.
- Claude Mythos Preview has found thousands of high-severity vulnerabilities, including in every major operating system and browser, according to Anthropic.
- The model is not publicly released; Anthropic committed up to $100 million in usage credits and $4 million to open-source security groups.
- Expect a wave of security patches. Updating quickly is the best defence.
Security has always been a race between defenders and attackers. AI that can find flaws at scale changes the speed of that race for everyone.
What happened
Constellation Research reported the launch and partners, and GIGAZINE explained why Anthropic is limiting access while defenders patch. Anthropic shares more detail at anthropic.com/glasswing.
What it means for businesses
- More patches, sooner. Operating systems, browsers and open-source tools will ship more fixes.
- Old software is riskier. Unmaintained plugins and themes become easier targets.
- Defence improves. The same techniques help vendors secure the tools you use.
Website security in the AI era
| Action | Why |
|---|---|
| Auto-update CMS and plugins | Close new holes within days, not months. |
| Remove unused plugins | Less code, fewer vulnerabilities. |
| Daily offsite backups | Recover fast if something slips through. |
| Monitor and harden logins | MFA and lockout protection for admins. |
Frequently asked questions
What is Project Glasswing?An Anthropic initiative launched in April 2026 that gives selected technology and security organisations access to Claude Mythos Preview to find and fix vulnerabilities.
An Anthropic initiative launched in April 2026 that gives selected technology and security organisations access to Claude Mythos Preview to find and fix vulnerabilities.
Can I use Claude Mythos Preview?It is not publicly available. It is shared with a limited group of partners for defensive security work.
It is not publicly available. It is shared with a limited group of partners for defensive security work.
What should a small business do now?Keep website software, devices and browsers updated, remove unused plugins, keep backups and protect admin accounts with strong MFA.
Keep website software, devices and browsers updated, remove unused plugins, keep backups and protect admin accounts with strong MFA.
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