LeakNet claims it stole 11TB of NYC Health + Hospitals data containing sensitive medical, financial and biometric records linked to more than 12 million…
Tag: Data Breach
Revolut Data Breach? Hackers Claim 75 Million User Records
Threat actors claim to be selling a database containing more than 75 million alleged Revolut user records.
From Benchmark to Breach: Inside the First End-to-End Autonomous Cyberattack
Incident Overview On July 27, 2026, the Cloud Security Alliance (CSA) released its initial post-mortem detailing the first publicly documented end-to-end…
MCBS Healthcare Data Breach Affects 1.26 Million People
A cyberattack on a medical billing company has potentially exposed information belonging to more than 1.26 million people, underscoring that healthcare’s…
Ernst & Young Notifies Clients Following Third-Party Support Platform Data Breach
The company Ernst & Young (EY) has sent out notices to the affected clients about the data breach involving the third-party support ticket platform, which…
As data breaches grow costlier, ungoverned AI creates new risks
Meanwhile, many companies still aren’t doing the basics to protect on-premises data, IBM found.
OpenAI explains how its AI agent breached Hugging Face
OpenAI has published an update on the incident in which one of its agents escaped its sandbox and accessed Hugging Face infrastructure.
Frontier Airlines Hit by Third Data Breach
Frontier Airlines is facing scrutiny after reportedly suffering its third data security incident in 2024, marking a troubling pattern for the budget…
Anthropic AI models breached three real companies
Anthropic revealed Thursday that three of its Claude AI models escaped test environments and successfully breached real-world companies during security…
IBM: Average Data Breach Cost Hits $5M
The global average cost of a data breach has climbed to $4.99 million, marking a 12% increase over the previous year and setting a new record, according…
Anthropic Says Claude Mistook the Open Internet for a CTF and Breached Three Organizations
Anthropic on Thursday became the latest artificial intelligence (AI) company to reveal that three of its models, including Claude Opus 4.7, Mythos 5, and…
The Average Cost of a Data Breach Rises to $5 Million
IBM Cost of a Data Breach Report warns that the global average cost of a data breach has reached a record high of $4.99m – and AI-backed attacks have…
Anthropic’s Claude breached three companies during security tests
Anthropic has disclosed that its AI model Claude gained unauthorized access to the systems of three different organizations during cybersecurity…
Anthropic Finds Claude Breached Real Companies During Security Evaluations
Anthropic says a misconfigured test let Claude access three real organizations, prompting tighter AI evaluation and monitoring controls. Anthropic…
Anthropic Reveals Claude Escaped Testing, Breaching Three Companies
Anthropic has revealed that Claude AI models broke free of sandbox to compromise third-party organizations
CareCloud Data Breach Impacts Over 350,000
In March 2026, hackers stole personal, financial, and medical information from the company’s AWS environment.
Analog Devices breach, Copilot AI worm, Teams ransomware vishing
Semiconductor firm Analog Devices discloses data breach Copilot for Word POC copies hidden prompts into new documents Microsoft Teams vishing attacks lead…
OpenAI Agent Used Exposed Credentials Across Four Services During Hugging Face Breach
OpenAI on Tuesday revealed the rogue artificial intelligence (AI) agent that escaped its sealed evaluation environment and broke into Hugging Face’s…
ShinyHunters Claims Ernst & Young (EY) Data Breach, Threatens July 31 Leak
EY confirmed the theft of client tax documents from its third-party support platform. ShinyHunters claims responsibility and is threatening to publish the…
AI Agents, Trust Abuse, and Breaches Define Cybersecurity News this Week of July 2026
Weekly summary of Cybersecurity Insider newsletters for July 2026