cybersecurity — Cybersecurity News

GitHub Breached - Employee Device Hack Led to Exfiltration of 3,800+ Internal Repos

RedSide Security May 20, 2026 Data Leaks & Breaches 85 views

GitHub is investigating unauthorized access to its internal repositories following a supply chain attack linked to the threat actor **TeamPCP**, who reportedly listed GitHub source code and internal data for sale on a cybercrime forum. The incident is part of an ongoing malware campaign targeting open-source ecosystems, including a compromised Microsoft Python package and a self-replicating infostealer known as Mini Shai-Hulud.

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NGINX CVE-2026-42945 Exploited in the Wild, Causing Worker Crashes and Possible RCE

RedSide Security May 17, 2026 CVE 90 views

A critical NGINX vulnerability tracked as CVE-2026-42945 is now being actively exploited in the wild, just days after public disclosure. The flaw allows attackers to crash NGINX worker processes and potentially achieve remote code execution under specific conditions. At the same time, threat actors have also begun weaponizing multiple critical vulnerabilities in openDCIM to deploy PHP web shells and gain remote access to exposed systems.

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First Public macOS Kernel Exploit on Apple M5 Prepared Using Mythos Preview in Five Days

RedSide Security May 17, 2026 Vulnerability 200 views

Security researchers have reportedly developed the first public macOS kernel exploit targeting Apple’s new M5 silicon, successfully bypassing the company’s hardware-based Memory Integrity Enforcement (MIE) protections. The exploit chain achieves full root access on macOS 26.4.1 using only standard system calls from an unprivileged local account, highlighting the growing impact of AI-assisted offensive security research.

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TeamPCP and BreachForums Launch $1,000 Contest to Drive Open-Source Supply Chain Attacks

RedSide Security May 14, 2026 Cybersecurity 115 views

Cybercrime groups **TeamPCP** and **BreachForums** are reportedly running a coordinated contest offering a $1,000 Monero prize for supply chain attacks targeting open-source ecosystems. The competition incentivizes participants to compromise software packages and CI/CD pipelines using a malicious tool called “Shai-Hulud,” raising serious concerns about large-scale, crowdsourced software supply chain compromise.

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Linux Kernel Dirty Frag LPE Exploit Enables Root Access Across Major Distributions

RedSide Security May 10, 2026 CVE 86 views

A newly disclosed Linux kernel vulnerability chain, dubbed **Dirty Frag**, enables unprivileged local users to gain root access across major Linux distributions. The flaw combines two page-cache write issues in the xfrm-ESP and RxRPC subsystems, creating a deterministic and highly reliable privilege escalation method. Limited in-the-wild exploitation has already been observed, with attackers using it in post-SSH compromise scenarios.

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