XBOW earns Google Chrome full-chain bounty using GPT-5.6 Sol

What happened

Greg Brockman highlights XBOW’s report of finding a critical Chrome vulnerability with GPT-5.6 Sol in 6 days using $40,000 of compute, earning Google’s first full-chain reward in 2026 for an exploit affecting an estimated 1 billion users. He emphasizes the opportunity for defenders to use these tools to secure their software. In the quoted post, @oegerikus reports a $250,000 bounty for the Chrome on Windows exploit.

The story so far

XBOW won a $250,000 Google bounty for a full-chain exploit affecting Chrome on Windows, the first awarded under Google’s 2026 rules, according to @oegerikus’s account shared by Greg Brockman. Brockman said XBOW found a critical Chrome vulnerability using GPT-5.6 Sol in six days with $40,000 in compute, while the quoted account said Brendan and the agents built a new exploit in six days. Brockman highlighted an estimate that the exploit affected 1 billion users and said the result showed an opportunity for defenders to use these tools to secure their software.

Keep reading

Trending now

1. 1Meta Releases Muse Spark Open With Mac and Cloud Support, Topping US Open-Weight Index
2. 2Google Launches Gemini 4 Argon Globally, Expands Paid Access as Benchmark Results Vary
3. 3OpenAI Updates GPT-6 Astra Pro in ChatGPT With Parallel Agents and Faster Responses
4. 4Meta’s New Business Terms Raise Dispute Over Website Crawling and AI Training Rights