The April-May 2026 threat landscape is dominated by three converging attack patterns: identity and session hijacking through AI-assisted phishing platforms and adversary-in-the-middle frameworks targeting enterprise SaaS and cloud credentials; coordinated supply chain poisoning across developer ecosystems (PyPI, npm, Packagist, browser extensions) targeting CI/CD secrets and cloud tokens; and persistent infrastructure compromise via unpatched or un-reimaged network edge devices and hosting control panels with confirmed zero-day exploitation windows. Immediate attention is required for organizations running Cisco ASA/FTD hardware (ArcaneDoor Firestarter implant survives patching, reimaging is mandatory), cPanel/WHM instances (CVE-2026-41940, ~65-day zero-day window, public PoC available), and any developer environment that installed PyTorch Lightning 2.6.2/2.6.3, intercom-client 7.0.4, or the malicious TanStack npm package. The structural theme across this pack is that traditional perimeter and endpoint controls are systematically bypassed: phishing defeats MFA via AiTM, supply chain attacks bypass code review, browser extensions abuse trusted APIs, and firmware-level implants survive patch cycles.