Search: “Claude Mythos 5”

31 stories

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DomainAll Cyber AIWindow24h 3d 7d 30d AllIn the wild Important only Show duplicates

CategoryAll AI safety & security 19 Vulnerability 17 Exploit / PoC 10 Data breach 8 Model release 5 Malware 5 Policy & legal 3 Ransomware 3 Threat actor 3 AI industry 2 Tools 1 Research 1

SeverityAll critical 31 high 9 medium 25 low 1 info 11

Claude Mythos 5 Tried to Backdoor a Real Open-Source Project in Testing, Then Vouched for Itself

The Hacker NewsAug 5, 07:53 UTC · Aug 5, 2026Malware

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Anthropic Releases Claude Fable 5, Its Most Powerful AI Yet, With Cyber Safeguards

The Hacker NewsJun 10, 07:37 UTC · Jun 10, 2026Exploit / PoC CVE-2026-47471

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Anthropic's new model is Mythos on a leash

CyberScoopJun 9, 19:46 UTC · Jun 9, 2026Exploit / PoC in the wild

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Anthropic Says Claude Mistook the Open Internet for a CTF and Breached Three Organizations

The Hacker NewsJul 31, 16:17 UTC · Jul 31, 2026Data breach1

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Anthropic Reveals Claude Escaped Testing, Breaching Three Companies

Infosecurity MagazineJul 31, 08:35 UTC · Jul 31, 2026Vulnerability

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⚡ Weekly Recap: AI Goes Rogue, Metabase 0-Day, MCP Supply

The Hacker NewsAug 10, 15:03 UTC · Aug 10, 2026Ransomware in the wildCVE-2026-34348 CVE-2026-18497 CVE-2026-63508+43 CVEs1

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Cybersecurity experts don’t think Anthropic’s Fable 5 presents a unique threat

CyberScoopJun 15, 19:32 UTC · Jun 15, 2026Exploit / PoC in the wild

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U.S. Orders Anthropic to Suspend Fable 5 and Mythos 5 Access for Foreign Nationals

The Hacker NewsJun 15, 00:00 UTC · Jun 15, 2026Vulnerability

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Cyber Experts Urge US to Lift Ban on Anthropic’s Frontier AI Models

Infosecurity MagazineJun 15, 10:30 UTC · Jun 15, 2026Vulnerability

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Trump administration unveils AI-supported clearinghouse for cyber vulnerabilities

The RecordJul 15, 20:37 UTC · Jul 15, 2026Vulnerability

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⚡ Weekly Recap: Rogue AI Models, $88M Bitcoin Theft, Water

The Hacker NewsAug 3, 14:03 UTC · Aug 3, 2026Data breach CVE-2026-42897 CVE-2026-66066

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ThreatsDay Bulletin: Claude Chat Abuse, NastyC2 npm Packages, Device

The Hacker NewsJun 18, 15:29 UTC · Jun 18, 2026Exploit / PoC CVE-2026-20127

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A tale of two eras

Cisco TalosJun 11, 18:00 UTC · Jun 11, 2026Ransomware

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Claude published malicious code to the Internet and attacked 3 real companies

Ars Technica · SecurityJul 31, 20:39 UTC · Jul 31, 2026Data breach1

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Anthropic says its AI accidentally hacked three companies during safety tests

CyberScoopJul 31, 02:10 UTC · Jul 31, 2026Exploit / PoC in the wild1

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The Shift: A New Era of AI Regulation

Recorded FutureJul 14, 00:00 UTC · Jul 14, 2026Policy & legal1

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Intel agencies: Frontier AI models will reshape cybersecurity faster than expected

CyberScoopJun 23, 14:03 UTC · Jun 23, 2026Exploit / PoC in the wild

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US lifting export control restrictions on Anthropic’s Mythos, Fable

CyberScoopJul 2, 14:44 UTC · Jul 2, 2026Exploit / PoC in the wild

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Contrast CVE Shield aims to protect applications while security teams deploy patches

Help Net SecurityJul 29, 00:00 UTC · Jul 29, 2026Vulnerability in the wildCVE-2021-442281

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Security Affairs newsletter Round 583 by Pierluigi Paganini – INTERNATIONAL EDITION

Security AffairsJul 4, 23:02 UTC · Jul 4, 2026Ransomware CVE-2026-47729 CVE-2026-20971 CVE-2026-20245+1 CVEs

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ThreatsDay Bulletin: AI Agents Gone Wrong, Sketchy C2 Tools, ClickFix Tricks, JS Backdoors & 20+ New Stories

The Hacker NewsJun 4, 14:00 UTC · Jun 4, 2026Malware in the wildCVE-2026-202301

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Anthropic's new AI model finds and exploits zero-days across every major OS and browser

Help Net SecurityJun 19, 12:14 UTC · Jun 19, 2026Exploit / PoC in the wildCVE-2026-4747

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Growing hacking threat to satellite systems compels global push to secure outer space

CyberScoopJun 1, 21:26 UTC · Jun 1, 2023Exploit / PoC

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Week in review: cPanel vulnerability actively exploited, DigiCert breach, LinkedIn job scams

Help Net SecurityMay 10, 00:00 UTC · May 10, 2026Vulnerability in the wildCVE-2026-41940 CVE-2026-4670 CVE-2026-5174+4 CVEs

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Week in review: SimpleHelp vulnerability exploited, Oracle EBS Payments flaw under attack

Help Net SecurityJul 5, 00:00 UTC · Jul 5, 2026Vulnerability in the wildCVE-2026-12569 CVE-2026-48558 CVE-2026-46817

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⚡ Weekly Recap: Linux Flaws, Defender 0-Days, Router Botnets, and Supply Chain Chaos

The Hacker NewsMay 26, 04:39 UTC · May 26, 2026Malware in the wildCVE-2026-46333 CVE-2026-41091 CVE-2026-45498+31 CVEs

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US lifts export controls on Anthropic’s frontier cybersecurity AI models

The RecordJul 1, 13:22 UTC · Jul 1, 2026Vulnerability

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AISI, OpenAI report more ‘unsanctioned’ model hacks

CyberScoopAug 4, 22:46 UTC · Aug 4, 2026Policy & legal in the wild1

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⚡ Weekly Recap: Linux Kernel Flaws, AI Malware Tricks, Turla Backdoor, Infostealers and More

The Hacker NewsJun 29, 14:42 UTC · Jun 29, 2026Malware in the wildCVE-2026-43503 CVE-2026-12569 CVE-2026-47729+19 CVEs

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Week in review: Windows zero-day exploit leaked, Patch Tuesday forecast

Help Net SecurityApr 12, 00:00 UTC · Apr 12, 2026Exploit / PoC in the wildCVE-2026-341971

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Week in review: Acrobat Reader flaw exploited, Claude Mythos offensive capabilities and limits

Help Net SecurityApr 19, 00:00 UTC · Apr 19, 2026Data breach in the wildCVE-2026-34621 CVE-2026-39813 CVE-2026-39808

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