Lee Ennis

Sr Manager, Data Science

Lee Ennis leads the AI data science and research team at F5, where he focuses on developing advanced AI security solutions that help enterprises safely deploy and monitor large language models (LLMs) and generative AI systems. His team combines expertise in machine learning, adversarial testing, and model assurance to identify vulnerabilities and strengthen trust in AI-driven environments.

Research by Lee Ennis (12)

Unprompted: When AI Agents Expose Data Without an Attacker

Article | Oct 21, 2026

Unprompted: When AI Agents Expose Data Without an Attacker

Four new incidents, and CASI/ARS Score updates

8 min read

Capability Is Closing the Open-Closed Gap; Security Is Not

Article | Aug 12, 2026

Capability Is Closing the Open-Closed Gap; Security Is Not

A competitive open-weight model, Claude Fable, and Jade Puffer.

7 min read

Adversarial Tales

Article | Jul 14, 2026

Adversarial Tales

A competitive open-weight model, Claude Fable, and Jade Puffer

8 min read

Topic Bridge

Article | Jun 3, 2026

Topic Bridge

CASI leaderboard shifts, and two incidents where AI was handed the keys.

11 min read

The Small Model Cliff

Article | May 27, 2026

The Small Model Cliff

CASI Leaderboard, Bias Jailbreak, and Three Coordinated Supply Chain Incidents

7 min read

CASI Leaderboard Shifts: Developer Role Attack, and Three Concerning Incidents

Article | Apr 9, 2026

CASI Leaderboard Shifts: Developer Role Attack, and Three Concerning Incidents

AI Security Insights – April 2026

9 min read

CASI Leaderboard Shifts: Sugar-Coated Poison, and the Expanding AI Attack Surface

Article | Mar 5, 2026

CASI Leaderboard Shifts: Sugar-Coated Poison, and the Expanding AI Attack Surface

AI Security Insights – March 2026

7 min read

AI Capabilities Are Advancing Faster Than AI Security

Article | Feb 26, 2026

AI Capabilities Are Advancing Faster Than AI Security

AI Security Insights – February 2026

7 min read

When AI Gets Bullied: How Agentic Attacks Are Replaying Human Social Engineering

Article | Jan 13, 2026

When AI Gets Bullied: How Agentic Attacks Are Replaying Human Social Engineering

AI Security Insights – January 2026

8 min read

Adversarial Poetry and the Efficacy of AI Guardrails

Article | Dec 11, 2025

Adversarial Poetry and the Efficacy of AI Guardrails

We investigate the rise of adversarial poetry in AI security. Understand how metaphor-based exploits circumvent guardrails and the defenses we need for LLMs moving forward.

4 min read

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