In 2026, the SaaS security landscape has reached a tipping point where identity is the primary battleground and AI agents have introduced an entirely new risk surface. Attackers are no longer just targeting humans; they are co-opting trusted autonomous "insider" agents that operate at machine speed across deeply interconnected systems. With non-human identities projected to outnumber human ones by two-to-one, traditional perimeters have dissolved, leaving legacy infrastructure and manual processes dangerously exposed. The impact of a SaaS breach in this hyper-automated era is catastrophic, with average costs hitting $4.88 million and triggering intense regulatory penalties under GDPR and CCPA. Organizations must pivot from mere visibility to aggressive remediation, addressing the 85% of accounts that remain over-privileged. To survive the 2026 threat landscape, security strategies must emphasize automated posture management and robust non-human identity (NHI) governance to neutralize AI-driven exploits before they propagate.