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...
    Cybersecurity
  • Iintegration and use of emerging tools

    Future Proof Your Security Career with AI Skills

    AI’s evolution demands security leaders master...
    Security Leadership and Management
    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

Opened padlock on computer keyboard

10 Data Breaches to Know About (April 2026)

Laptop with desktop screen showing

Research: Microsoft Edge Loads Stored Passwords in Cleartext

SEC Podcast Header Podcast

Credential Management in High Turnover Environments

Glowing police siren

Security Isn’t a Commodity. Neither Is Off-Duty Law Enforcement

Laptop in darkness

Reframing MFA Bypass: Four Identity Gaps Attackers Exploit

SEC 2026 Benchmark Banner

Events

June 10, 2026

Applying Agentic AI in Security Operations for Faster Decisions & Better Outcomes

Security teams have never had more visibility. We’ll explore how a new decision layer is helping security teams move from detection to decision. Turn alerts into decision-ready context, reducing reliance on manual triage and enabling faster action.

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


Alertmedia sponsored webinar

Related Articles

  • Aerial view of America

    US Security Agency Leverages Claude Mythos Despite Pentagon Blacklist

    See More
  • AI chip

    Security Leaders Discuss the Claude Mythos Breach

    See More
  • Abstract shape

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

    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