0day
New Gogs zero-day flaw lets hackers get remote code execution
An unpatched zero-day vulnerability in the Gogs self-hosted Git service can allow attackers to gain remote code execution (RCE) on Internet-facing instances. Designed as an alternative to GitHub Enterprise or GitLab and written in Go, Gogs is often exposed online for remote collaboration. This critical severity argument injection security flaw has yet to be assigned a CVE […]
KnowledgeDeliver flaw exploited as a zero-day to install web shells
Hackers exploited a critical zero-day vulnerability in a server running the KnowledgeDeliver learning management system (LMS) to deploy the Godzilla web shell. The flaw is a deserialization issue tracked as CVE-2026-5426 and can be exploited without authentication. It stems from the use of a shared hardcoded machine key in the web portal configuration across all KnowledgeDeliver customer […]
Google accidentally exposed details of unfixed Chromium flaw
Google has accidentally leaked details about an unfixed issue in Chromium that keeps JavaScript running in the background even when the browser is closed, allowing remote code execution on the device. The flaw was reported by security researcher Lyra Rebane and acknowledged as valid in December 2022, as per the thread on Chromium Issue Tracker. […]
Microsoft warns of new Defender zero-days exploited in attacks
On Wednesday, Microsoft started rolling out security patches for two Defender vulnerabilities that have been exploited in zero-day attacks. The first one, tracked as CVE-2026-41091, is a privilege escalation security flaw affecting Microsoft Malware Protection Engine 1.1.26030.3008 and earlier, which provides the scanning, detection, and cleaning capabilities for Microsoft antivirus and antispyware software. This flaw stems […]
Max-severity flaw in ChromaDB for AI apps allows server hijacking
A max-severity vulnerability in the latest Python FastAPI version of the ChromaDB project allows unauthenticated attackers to run arbitrary code on exposed servers. The flaw is tracked as CVE-2026-45829 and was reported to ChromaDB on February 17. It received the maximum severity score from HiddenLayer, the company that discovered it. ChromaDB is an open-source vector database and AI retrieval […]
Microsoft shares mitigation for YellowKey Windows zero-day
Microsoft has shared mitigations for YellowKey, a recently disclosed Windows BitLocker zero-day vulnerability that grants access to protected drives. The security flaw was disclosed last week by an anonymous security researcher known as ‘Nightmare Eclipse,’ who described it as a backdoor and published a proof-of-concept (PoC) exploit. Nightmare Eclipse said that exploiting this zero-day involves placing specially […]
Hackers earn $1,298,250 for 47 zero-days at Pwn2Own Berlin 2026
The Pwn2Own Berlin 2026 hacking contest has concluded, with security researchers collecting $1,298,250 in rewards after exploiting 47 zero-day flaws. The competition took place at the OffensiveCon conference from May 14 to May 16 and focused on enterprise technologies and artificial intelligence. Throughout the contest, the hackers targeted fully patched products across web browsers, enterprise applications, local […]
New Windows ‘MiniPlasma’ zero-day exploit gives SYSTEM access, PoC released
A cybersecurity researcher has released a proof-of-concept exploit for a Windows privilege escalation zero-day dubbed “MiniPlasma” that lets attackers gain SYSTEM privileges on fully patched Windows systems. The exploit was published by a researcher known as Chaotic Eclipse, or Nightmare Eclipse, who released both the source code and a compiled executable on GitHub after claiming […]
Microsoft Exchange, Windows 11 hacked on second day of Pwn2Own
During the second day of Pwn2Own Berlin 2026, competitors collected $385,750 in cash awards after exploiting 15 unique zero-day vulnerabilities in multiple products, including Windows 11, Microsoft Exchange, and Red Hat Enterprise Linux for Workstations. The Pwn2Own Berlin 2026 hacking competition takes place at the OffensiveCon conference from May 14 to May 16 and focuses on enterprise technologies and […]
Microsoft warns of Exchange zero-day flaw exploited in attacks
On Thursday, Microsoft shared mitigations for a high-severity Exchange Server vulnerability exploited in attacks that allow threat actors to execute arbitrary code via cross-site scripting (XSS) while targeting Outlook on the web users. Microsoft describes this security flaw (CVE-2026-42897) as a spoofing vulnerability affecting up-to-date Exchange Server 2016, Exchange Server 2019, and Exchange Server Subscription […]