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A use-after-free bug in Linux's KVM hypervisor can be triggered from a guest virtual machine to corrupt the shadow-page state of the host kernel that runs it. Dubbed ' Januscape ' and tracked as  CVE-2026-53359 , the flaw sits in the shadow MMU code that KVM shares across both Intel and AMD. The public proof-of-concept panics the host; the researcher claims that a separate, unreleased exploit turns the same bug into full host code execution. Security researcher  Hyunwoo Kim (@v4bel) found and reported the bug. He described Januscape as the first guest-to-host exploit triggerable on both Intel and AMD, to the best of public knowledge. The flaw went unnoticed for roughly 16 years. According to Kim, the exploit was used as a zero-day submission in  Google's kvmCTF , the controlled KVM vulnerability reward program that offers up to $250,000 for full guest-to-host escapes. How It Works To run a virtual machine, KVM keeps its own private set of page tables that mi...

Threat actors have been observed attempting to exploit a recently patched critical security flaw in Gitea Docker images, according to Sysdig . The vulnerability in question is CVE-2026-20896 (CVSS score: 9.8), a vulnerability that stems from the DevOps platform trusting the "X-WEBAUTH-USER" header from any source IP address, effectively allowing an unauthenticated internet client to get elevated access. In a statement shared with The Hacker News via email, security researcher Ali Mustafa (@rz1027), who is credited with discovering and reporting the flaw, said the Gitea Docker images shipped an "app.ini" template that hard-codes "REVERSE_PROXY_TRUSTED_PROXIES = *" by default. The " app.ini " file is a core configuration file for managing server parameters, database connections, security behavior, and application settings. "With reverse-proxy login enabled, that wildcard trusts every source IP, so anyone who could reach the port coul...

A streaming box should not need a threat model. Neither should a username field, a demo repo, a reset flow, or a browser permission prompt. That is the irritating part this week: the risky pieces were ordinary. Home devices became a routing cover. Clean code pulled dirt from a dependency. Identity shortcuts aged badly. AI systems trusted the wrong instructions. Same soft spot throughout: trust placed one layer too early. Below is the full recap, since this is apparently what counted as a normal week. ⚡ Threat of the Week NetNut Residential Proxy Network Disrupted — Google, in collaboration with the U.S. Federal Bureau of Investigation (FBI), Lumen, and other partners, took action against the NetNut residential proxy network, also known as Popa, building upon its takedown of IPIDEA in January 2026. Google said it disabled Google accounts and associated Google services used by NetNut for malware command-and-control (C2) and updated Google Play Protect, in addition to disabling ...

Building a shortlist for an AI SOC evaluation can be tough. SIEM, SOAR, and pureplay AI SOC vendors are all saying the same thing. But behind the identical label sit very different products, from chat assistants bolted onto a legacy SIEM to agent platforms that run detection, triage, investigation, and response on their own data foundation. Whether a platform will materially change outcomes for your team matters more than what it is called. We can measure that in investigation time, false-positive volume, analyst hours returned, total cost of running your SOC and finally whether the architecture will hold up 2-3 years from now as the volume, speed and complexity of attacks keep increasing. What Is an AI SOC Platform? An AI SOC platform is a security operations platform where AI agents carry out the core work of the SOC (detection, triage, investigation, and response) by reasoning over correlated security data, under human oversight. It differs from bolt-on AI, which summarizes ...

A suspected China-nexus threat activity cluster has been observed targeting Indian taxpayers, tax professionals, and corporate finance teams to deliver a remote access trojan designed to steal sensitive data from compromised hosts. The multi-stage campaign, codenamed Operation DragonReturn by Seqrite Labs, involves sending spear-phishing emails impersonating the Income Tax Department of India. It was first observed on May 18, 2026. The activity, per the cybersecurity company, coincides with the annual income tax filing season in the country. "It is not opportunistic – the precision of the lure document, the use of real legal citations, bilingual content, and active payload rotation indicate a deliberate, resourced, and sustained threat operation focused exclusively on the Indian taxpayer ecosystem," security researchers Dixit Panchal and Soumen Burma said . The end goal of the campaign is assessed to be the deployment of malware for financial gain or sensitive data the...

Researchers at  Shandong University  have shown a fast new way to pull data off computers that are cut off from every network. The technique, called  TrojPix , tweaks on-screen pixels in ways the eye cannot see, so that the video cable carrying them radiates a faint radio signal a nearby receiver can decode. But TrojPix works only once malware is already on the target machine, so it is a way for stolen data to get out, not a way in. In the researchers' tests, TrojPix hit a peak throughput of 8.1 Mbps and reached as far as 208 meters, the two measured separately rather than together. Most air-gap covert channels crawl along at bits or kilobits per second; at 8.1 megabits, roughly a megabyte a second, TrojPix could move a 100 MB file in under two minutes. That turns the threat from leaking a password into moving whole files while the monitor looks switched off. Real-world range is another matter: a receiver still has to fight through walls, shielding, and noise. Th...

Cybersecurity researchers have flagged a novel Java-based remote access trojan (RAT) called QuimaRAT that's capable of targeting Windows, Linux, and macOS environments. According to LevelBlue, the cross-platform malware is advertised under a malware-as-a-service (MaaS) model, costing anywhere between $150 for one month to $1,200 for lifetime access. Other subscription tiers include $300 for three months, $500 for six months, and $700 for twelve months. "Built around a modular architecture, the RAT supports dynamic capability expansion through encrypted plugins that can be delivered, loaded, unloaded, and updated directly from its command-and-control (C2) infrastructure," the cybersecurity company said in an analysis of the malware. The malware author also advertises a builder capable of generating multiple output formats, including JAR, EXE, APP, SH, BAT, and VBS, indicating an attempt to help prospective customers package the client tailored for different enviro...