---
id: "simon-willison-the-lethal-trifecta"
title: "The lethal trifecta for AI agents (Simon Willison)"
creator: null
creator_url: null
creator_x: null
url: "https://simonwillison.net/2025/Jun/16/the-lethal-trifecta/"
level: "intermediate"
level_max: "intermediate"
category: "security-and-red-teaming"
subcategory: "safety-and-alignment-evals"
region: "unknown"
license: "unknown"
license_scope: "linked-resource"
access: "free"
models: []
source_date: null
date_added: "2026-10-18"
resource_kind: "learning_resource"
verification_basis: "supplier-inventory-v2.3"
access_evidence: "Supplier-approved free inventory; not independently verified by this site."
domain_top: "Safety, security & interpretability"
domain_sub: "security & red-teaming"
last_verified: "2026-10-18"
---

[Jailbreaking and red teaming](/security-and-red-teaming/index.md)

# The lethal trifecta for AI agents (Simon Willison)

Creator not supplied; see original source.

[Read the original →](https://simonwillison.net/2025/Jun/16/the-lethal-trifecta/)

Simon Willison's post on the lethal trifecta: private data, untrusted content and exfiltration make AI agents exploitable.

Level: [Intermediate](/levels/index.md)
Models: 
Category: [Jailbreaking and red teaming](/security-and-red-teaming/index.md)
Tags: [safety-security-interpretability](/tags/safety-security-interpretability/index.md), [security-red-teaming](/tags/security-red-teaming/index.md)
Source date: date not stated
Added: 2026-10-18
Last verified: 2026-10-18
Status: ok
Prerequisites: source
Subcategory: [safety and alignment evals](/security-and-red-teaming/safety-and-alignment-evals/index.md)
Region: unknown
Original language: en
Access: free
Resource reuse: unknown: Not supplied; no reuse grant asserted. [Facet definitions](/about/index.md#facets)
Verification basis: Supplier-reported live check; no independent HTTP verification by this site.
Access evidence: Supplier-approved free inventory; not independently verified by this site.
Source domain: Safety, security & interpretability
Source subdomain: security & red-teaming
Supplier region label: UK/US

Summary in our own words. Rights remain with the original creator. [Credit and correction policy](/about/index.md#credit-policy).

[Plain-text Markdown copy](/security-and-red-teaming/safety-and-alignment-evals/simon-willison-the-lethal-trifecta/index.md)