OpenAI Compaction Flaw Exposed AI Reasoning to Researchers
Researchers uncovered an OpenAI API flaw that exposed hidden AI reasoning traces, prompting a fix and a $6000 bug bounty reward
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Researchers uncovered an OpenAI API flaw that exposed hidden AI reasoning traces, prompting a fix and a $6000 bug bounty reward
Cybersecurity research firm Xint on Monday published details of a bug in the OpenAI API that leaks raw reasoning traces from frontier OpenAI models, revealing the risk of other data leaks. OpenAI has confirmed the flaw, mitigated it, and paid a bug bounty for its discovery. The problem is that OpenAI had already deployed mitigations for the issue in August after a research report dubbed Stolen Thoughts revealed a sim…
Researchers have demonstrated remote code execution through CVE-2026-111497, an out-of-bounds write in Google's Brotli decoder library, and public proofs-of-concept (PoCs) are available. Software that uses the decoder includes Node.js, .NET, Bun, Envoy Proxy, Istio, Python HTTP clients and PHP for Windows.Key TakeawaysCVE-2026-111497, known as Brotli2Shell and by several other names, is an out-of-bounds write in Goog…
Police in South Korea have broken up a cybercrime ring accused of using generative AI to hack about 90 domestic companies, steal roughly 8.2 million personal records, and demand money in exchange for silence. Investigators believe the group's leader, who never studied IT, used AI to rapidly expand the range of targets. Seven Suspects Tied to the Cybercrime Ring On the 26th, the Cyber Investigation Division of the Seo…
Cybersecurity researchers have discovered an artificial intelligence (AI)-driven intrusion ecosystem run by affiliates of the INC and The Gentlemen ransomware groups. Central to the operation is an "Autonomous Red Team Kill Chain Framework" referred to as Phantom. The threat actor is assessed to be Russian-speaking and functions both as an intrusion and data-extortion operator, as well as an
When Anthropic introduced Claude Mythos Preview, the cybersecurity debate quickly turned to what AI could do: uncover decades-old vulnerabilities, develop working exploits and accelerate tasks that once required specialist expertise. Anthropic noted that Mythos discovered software flaws no human had caught, and early tests showed it could carry out multi-stage network attacks in minutes, tasks that once took skilled…
China-linked Storm-0940 used AI tool ARTEX to target 2,250 Microsoft 365 tenants, exploiting stolen ConnectWise credentials at machine speed. Microsoft published a detailed technical report naming Storm-0940, a China state-aligned group, as the actor behind the ConnectWise Cloud Backup supply chain compromise. The group used ARTEX, an open-source AI-driven penetration testing framework, to run attacks […]
Storm-0940 used the agentic AI penetration testing framework to automate attacks and “reach more than 2,250 tenants at 2,900 sign-in attempts per minute,” Microsoft researchers said. The post Microsoft pins ConnectWise supply-chain attack to China-state aligned threat group appeared first on CyberScoop.
IntroductionIn October 2026, Zscaler ThreatLabz investigated AI-assisted cyberattacks that combined the ARTEX penetration testing framework with AI coding assistants and custom automation scripts. Initial reporting of the incident identified the targeting of South Korean financial institutions. However, ThreatLabz discovered additional information about the attack, which went far beyond South Korea. The AI-assisted a…
Why the controls on an AI agent have to live outside of it, and what a security operations team can do to implement and maintain those controls.The new privileged user in your environmentSecurity teams spent two decades learning how to work with the people they trust most. Domain admins, DBAs, finance approvers and contractors with VPN access all get a mature playbook: verified identity, scoped access, logged activit…
A chain of vulnerabilities in Google’s Chrome browser could have enabled researchers to take control of one billion Windows machines worldwide — and it cost them just $40,000 in AI compute time to discover it. Researchers at Xbow USA worked for six days on developing the exploit, which earned them a $250,000 bug bounty from Google, the first under the new 2026 rules. They chose OpenAI’s GPT-5.6 Sol for the task to de…
The DORA TLPT requirements push selected EU financial entities beyond standard penetration testing. TLPT must be based on realistic threat scenarios, relevant threat actors, and current intelligence about how attacks are actually carried out. That makes threat intelligence a core part of the process. It helps define what should be tested, which TTPs matter, and […] The post DORA TLPT Requirements Explained: Where Thr…
Parts 1 and 2 of this series looked at two pressures facing higher education security teams. First, the threat landscape: universities are dealing with more frequent attacks across complex, distributed environments, while campus-by-campus security can make it harder to share intelligence and coordinate response. Second, the compliance burden: overlapping requirements across FERPA, GLBA, HIPAA, and CMMC make it diffic…
IntroductionZscaler ThreatLabz analyzed a recently active exploitation campaign in which a threat actor abused ARTEX to target South Korean financial institutions. ARTEX is an open source agentic penetration testing framework developed in China that uses large language models (LLMs) to automate reconnaissance and exploitation tasks. First observed in late September 2026, the campaign affected multiple South Korean fi…
Most security tooling that fits into a CI/CD pipeline—static analysis (SAST), software composition analysis (SCA), and dynamic scanners (DAST)—flags potential issues from patterns and signatures. A flagged pattern shows you where to look; penetration testing is what confirms whether something is actually exploitable. That confirmation has traditionally come from a periodic, out-of-band engagement that runs […]
Xbow earned a $250K bug bounty and all the AI model got was a lousy t-shirt
This Cyble Research & Intelligence Labs (CRIL) weekly vulnerability report covers two views of risk: what attackers tried against Cyble's global honeypot sensors, and what the Cybersecurity and Infrastructure Security Agency (CISA) disclosed for industrial control systems (ICS). The Cyble Global Sensor Intelligence (CGSI) network observed exploitation attempts against about 20 known vulnerabilities. They range from n…
Overview AI is being used for various tasks that were previously performed manually, such as research, document writing, and code analysis. A 2026 corporate survey also showed that the scope of AI adoption among organizations had expanded compared to the previous year. Recently, there has been a trend toward automating a significant portion of work […]
Google is updating its Chrome Vulnerability Rewards Program (Chrome VRP), increasing payments for memory corruption vulnerabilities and expanding rewards for other security flaws, fixes and research tools. “A primary goal of the Chrome VRP has always been to identify ways to improve our internal testing by understanding which vulnerabilities are the most severe and challenging to uncover,” the company said. Higher pa…
Google is restructuring bug bounty rewards with a focus on complex memory safety vulnerabilities. The post Google Partially Reverses Chrome Bug Bounty Cuts appeared first on SecurityWeek.
Ridge Security has announced RidgeOne, a self-contained solution that brings autonomous AI-powered penetration testing and agentic red teaming to mid-sized organizations. Combining Ridge Security’s RidgeGen agentic security validation platform with an open-weight AI model running on NVIDIA DGX Spark, RidgeOne enables organizations to perform deep security testing within their own environment without sending sensitive…
GitLab just fixed a max-severity vulnerability that could allow unauthenticated attackers to execute arbitrary code on its servers. The company released a fix on Monday, alongside patches for five other high-severity flaws affecting its source code management and continuous integration and delivery (CI/CD) platform. The vulnerability, tracked as CVE-2026-97229, was fixed in versions 19.4.2, 19.3.5, and 19.2.8 of its…
The XRP Ledger (XRPL) has deployed an emergency patch for one of the most serious XRP vulnerabilities in its history, a flaw that could have allowed unlimited XRP to be created. By skipping the standard two-week validator vote, the fix has reignited debate over how decentralized the network really is, though developers and validators maintain the step was necessary and did not amount to centralized control. According…