React2Shell Zero-Day Hacker Foiled by 1970s Unix Permissions, Devs Now Dusting Off CS Textbooks

A recent cyberattack on a production server utilizing React Server Components was mitigated by basic Unix user isolation, a security principle from the 1970s. The attack, known as React2Shell, or CVE-2025-55182, is a critical zero-day vulnerability allowing unauthenticated remote code execution. Despite gaining code execution, the attackers were limited to accessing files owned by the nodeapp user due to proper isolation, protecting database credentials and production secrets. Meanwhile, a guide to Kubernetes autoscaling tools, including HPA, VPA, Cluster Autoscaler, Karpenter, and KEDA, highlights the importance of choosing the right tool for specific workloads. Additionally, a streamlined approach to AI-assisted coding, known as CLAUDE.md, emphasizes simple and testable progress. As 2026 begins, AI progress is accelerating, with models gaining novel capabilities and hardware scale exploding, according to Alex Wissner-Gross, with financiers backing private power to feed AI demand amid projected US shortfalls, underscoring the need for robust security measures and efficient coding practices.