# Dan Guido

Type: Person

Source: Cyber Intelligence Brief — https://getcyberbrief.com/entity/dan-guido
Canonical HTML page: https://getcyberbrief.com/entity/dan-guido

## Timeline

- **2026-06-22**: OpenAI announces cybersecurity initiatives — OpenAI unveils Patch the Planet, GPT-5.5-Cyber, Codex Security plug-in, and expanded Trusted Access for Cyber program.
- **2026-06**: Anthropic withdraws Fable 5 and Mythos 5 — Anthropic pulls its cybersecurity-capable models after the Trump administration raises concerns about inadequate safeguards.
- **2026-06**: White House imposes export restrictions on Anthropic models — The administration restricts exports of Fable 5 and Mythos 5, citing cybersecurity and biological function risks.
- **2026-06**: Trail of Bits conducts 5-day bug-finding sprint — 25 engineers work with open-source maintainers using OpenAI tools, uncovering hundreds of bugs and producing dozens of patches as part of Patch the Planet's kickoff.

## Recent coverage (1 stories)

### OpenAI's Patch the Planet Finds Hundreds of Bugs in 5-Day Sprint
2026-06-23 09:32:08 · Sentiment: Positive · Impact: 8/10 · Sources: 2

OpenAI and Trail of Bits kick off a large-scale bug-hunting initiative for open-source projects, uncovering hundreds of vulnerabilities in a single week. The effort aims to relieve maintainers overwhelmed by AI-generated vulnerability reports and sets a new standard for AI-augmented security triage.
Full story: https://getcyberbrief.com/story/openai-patch-the-planet-cybersecurity-bug-hunt

---
This page is a machine-readable summary. Sentiment measures the directional read of each development for this entity, not the tone of the reporting; impact weights consequence, not syndication reach. See https://getcyberbrief.com/guides/methodology for the full editorial methodology.