CRITICALVulnerability
Global

Mythos and Cybersecurity

Friday, April 17, 2026 at 11:02 AM UTC·Source: Schneier on Security

Updated: Friday, April 17, 2026 at 11:03 AM UTC

Executive Summary

Last week, Anthropic pulled back the curtain on Claude Mythos Preview , an AI model so capable at finding and exploiting software vulnerabilities that the company decided it was too dangerous to release to the public. Instead, access has been restricted to roughly 50 organizations—Microsoft, Apple, Amazon Web Services, CrowdStrike and other vendors of critical infrastructure—under an i

Analysis

Last week, Anthropic pulled back the curtain on Claude Mythos Preview , an AI model so capable at finding and exploiting software vulnerabilities that the company decided it was too dangerous to release to the public. Instead, access has been restricted to roughly 50 organizations—Microsoft, Apple, Amazon Web Services, CrowdStrike and other vendors of critical infrastructure—under an initiative called Project Glasswing . The announcement was accompanied by a barrage of hair-raising anecdotes: thousands of vulnerabilities uncovered across every major...
Source Attribution

Originally published by Schneier on Security on Apr 17, 2026.

Related Threats

HIGHVulnerabilityNEW

In Other News: Satellite Cybersecurity Act, $90K Chrome Flaw, Teen Hacker Arrested

Other noteworthy stories that might have slipped under the radar: ShinyHunters targets Rockstar Games, ShowDoc vulnerability exploited in the wild, and EPA to boost cybersecurity budget to $19 million. The post In Other News: Satellite Cybersecurity Act, $90K Chrome Flaw, Teen Hacker Arrested appeared first on SecurityWeek .

SecurityWeek
MEDIUMVulnerabilityNEW

NatWest Group expands free investment-focused financial guidance programme

NatWest Group is expanding its investment-focused Financial Foundations programme to 50,000 people in UK workplaces and community groups.

Finextra
LOWVulnerabilityNEW

Singer loses life savings to fake wallet downloaded from the Apple App Store

If you hold cryptocurrency, there's a very simple golden rule that you should always follow. Never hand over your seed phrase. Garrett Dutton, better known as G. Love - the front man of blues-hip-hop outfit G. Love & Special Sauce - has learnt that lesson the hard way. Read more in my article on the Hot for Security blog.

Graham Cluley