Prompt injection still drives most agentic AI security failures

Help Net Security reported that prompt injection remains a major cause of agentic AI security failures. The article cites CVE-2026-22708 affecting Cursor, where an attacker could poison the agent execution environment so allowlisted commands were used to deliver arbitrary payloads.

Help Net Security reports that prompt injection remains a leading cause of security failures in agentic AI systems, highlighting CVE-2026-22708 in Cursor where an attacker could poison the agent’s execution environment so that allowlisted commands delivered arbitrary payloads. The article indicates that even when commands are constrained, compromised context can still be used to subvert intended protections. From RealGround’s perspective, this illustrates that agent design must treat all external context and tool outputs as untrusted, with strict validation, isolation, and policy enforcement around what agents can execute. Continuous adversarial testing and business-logic-aware audits are necessary to detect and harden against prompt injection pathways before attackers exploit them.