Security Magazine logo
search
cart
facebook twitter linkedin youtube
  • Sign In
  • Create Account
  • Sign Out
  • My Account
Security Magazine logo
  • NEWS
    • Security Newswire
    • Technologies & Solutions
  • MANAGEMENT
    • Leadership Management
    • Enterprise Services
    • Security Education & Training
    • Logical Security
    • Security & Business Resilience
    • Profiles in Excellence
  • PHYSICAL
    • Access Management
    • Fire & Life Safety
    • Identity Management
    • Physical Security
    • Video Surveillance
    • Case Studies (Physical)
  • CYBER
    • Cybersecurity News
    • More
  • BLOG
  • COLUMNS
    • Career Intelligence
    • Cyber Tactics
    • Cybersecurity Education & Training
    • Leadership & Management
    • Security Talk
  • EXCLUSIVES
    • Annual Guarding Report
    • Most Influential People in Security
    • The Security Benchmark Report
    • Top Guard and Security Officer Companies
    • Top Cybersecurity Leaders
    • Women in Security
  • SECTORS
    • Arenas / Stadiums / Leagues / Entertainment
    • Banking/Finance/Insurance
    • Construction, Real Estate, Property Management
    • Education: K-12
    • Education: University
    • Government: Federal, State and Local
    • Hospitality & Casinos
    • Hospitals & Medical Centers
    • Infrastructure:Electric,Gas & Water
    • Ports: Sea, Land, & Air
    • Retail/Restaurants/Convenience
    • Transportation/Logistics/Supply Chain/Distribution/ Warehousing
  • EVENTS
    • Industry Events
    • Webinars
    • Solutions by Sector
    • Security 500 Conference
  • MEDIA
    • Interactive Spotlight
    • Photo Galleries
    • Podcasts
    • Polls
    • Videos
      • Cybersecurity & Geopolitical Discussion
      • Ask Me Anything (AMA) Series
  • MORE
    • Call for Entries
    • Classifieds & Job Listings
    • Newsletter
    • Sponsor Insights
    • Store
    • White Papers
  • EMAG
    • eMagazine
    • This Month's Content
    • Advertise
  • SIGN UP!
CybersecuritySecurity NewswireCybersecurity News

Unauthorized Users Accessed Claude Mythos, New Reports Suggest

By Jordyn Alger, Managing Editor
Laptop in darkness
Hostaphoto via Unsplash
April 22, 2026

Recent reports suggest an unauthorized group may have gained access to Anthropic’s new AI model, Claude Mythos Preview. Due to the model’s elevated capability to identify digital vulnerabilities, access to Mythos is limited to a select group of partners in an initiative known as Project Glasswing, and so the potential breach reported by Bloomberg News concerns some security experts. 

“Unauthorized users were able to access Anthropic’s Mythos model, reportedly by just changing a model name,” says Shane Fry, Chief Technology Officer at RunSafe Security. “Even if their intent is just to explore, it shows how easily these systems can be exposed.” 

According to the report, users in a private online forum accessed Mythos the same day the company announced a limited release of the model. 

Anthropic confirmed to CBS News that an investigation into them matter is underway. The investigation is looking into the possibility that the access originated from one of its third-party vendor environments, which the company collaborates with to develop its models. Currently, no breaches outside of the vendor environment have been identified. A compromise of Anthropic systems has also not been detected. 

“The reality is these AI capabilities are already out there, ‘hacked’ or not, and they’re going to accelerate how quickly vulnerabilities are found and exploited,” Fry concludes. “Software teams will need to look at how to harden their code so those vulnerabilities can’t be used in the first place.”

KEYWORDS: artificial intelligence (AI) Artificial Intelligence (AI) Security data breach investigations

Share This Story

Looking for a reprint of this article?
From high-res PDFs to custom plaques, order your copy today!

Jordynalger

Jordyn Alger is the managing editor for Security magazine. Alger writes for topics such as physical security and cyber security and publishes online news stories about leaders in the security industry. She is also responsible for multimedia content and social media posts. Alger graduated in 2021 with a BA in English – Specialization in Writing from the University of Michigan. Image courtesy of Alger

Recommended Content

JOIN TODAY
To unlock your recommendations.

Already have an account? Sign In

  • Cyber tech background

    Security’s Top Cybersecurity Leaders 2026

    Security magazine’s Top Cybersecurity Leaders 2026 award...
    Security Leadership and Management
  • Iintegration and use of emerging tools

    Future Proof Your Security Career with AI Skills

    AI’s evolution demands security leaders master...
    Career Intelligence
    By: Jerry J. Brennan and Joanne R. Pollock
  • The 2025 Security Benchmark Report

    The 2025 Security Benchmark Report

    The 2025 Security Benchmark Report surveys enterprise...
    The Security Benchmark Report
    By: Rachelle Blair-Frasier
Manage My Account
  • Security Newsletter
  • eMagazine Subscriptions
  • Manage My Preferences
  • Online Registration
  • Mobile App
  • Subscription Customer Service

More Videos

Popular Stories

Man on laptop

Healthcare Executives Face a New Era of Personal Risk

Man walking with briefcase

The Rising Tide of Executive Protection: Corporations Ramp Up Security in an Era of Heightened Threats

Stadium

Physical Security in Global Arenas: How AI Improves Security at Scale

Person in red hoodie

When Metal Theft Becomes a Life Safety Crisis

Stacked books

Safe Learning 101 Program Supports Schools in Strengthening Campus Security

SEC 2026 Benchmark Banner
SEC 2026 Benchmark Banner

Events

April 30, 2026

Building a Campus-Wide Culture of Security and Shared Responsibility

In today’s higher education environment, where institutions face evolving and multifaceted incidents, safety must be embedded into the fabric of campus culture. Learn strategies for generating collective buy-in from faculty, staff, students and senior leadership. 

May 7, 2026

Beyond Cameras: Revolutionizing Perimeter Security with LiDAR, AI and Digital Twins

In this webinar, we will explore how LiDAR‑based detection, AI‑powered analytics and digital twins are transforming the future of perimeter protection with 3D detection, real-time situational awareness and unified operational views.

View All Submit An Event

Products

Security Culture: A How-to Guide for Improving Security Culture and Dealing with People Risk in Your Organisation

Security Culture: A How-to Guide for Improving Security Culture and Dealing with People Risk in Your Organisation

See More Products
SEC 2026 Top Cybersecurity Leaders

Related Articles

  • Aerial view of America

    US Security Agency Leverages Claude Mythos Despite Pentagon Blacklist

    See More
  • Abstract shape

    What Are Security Experts Saying About Claude Mythos and Project Glasswing?

    See More
  • Macbook Air with apps showing

    New macOS vulnerability allows unauthorized data access

    See More

Related Products

See More Products
  • 9780815378068.jpg.jpg

    Biometrics, Crime and Security

  • into to sec.jpg

    Introduction to Security, 10th Edition

See More Products
×

Sign-up to receive top management & result-driven techniques in the industry.

Join over 20,000+ industry leaders who receive our premium content.

SIGN UP TODAY!
  • RESOURCES
    • Advertise
    • Contact Us
    • Store
    • Want More
  • SIGN UP TODAY
    • Create Account
    • eMagazine
    • Newsletter
    • Customer Service
    • Manage Preferences
  • SERVICES
    • Marketing Services
    • Reprints
    • Market Research
    • List Rental
    • Survey/Respondent Access
  • STAY CONNECTED
    • LinkedIn
    • Facebook
    • YouTube
    • X (Twitter)
  • PRIVACY
    • PRIVACY POLICY
    • TERMS & CONDITIONS
    • DO NOT SELL MY PERSONAL INFORMATION
    • PRIVACY REQUEST
    • ACCESSIBILITY

Copyright ©2026. All Rights Reserved BNP Media, Inc. and BNP Media II, LLC.

Design, CMS, Hosting & Web Development :: ePublishing