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The Guardian
· collected 2026-09-18 · by Dan Milmo Global technology editor
Cybersecurity researchers at Hacktron AI exploited OpenAI’s systems using Anthropic’s Claude chatbot, gaining access to ChatGPT accounts through an OpenAI staff forum. The hack, conducted under OpenAI's ethical hacking program and reported by the Wall Street Journal, resulted in a $6,500 reward for Hacktron. Researchers noted that advanced AI tools like Claude simplified what was once a complex task, reducing planning and execution time significantly.
Written locally by qwen2.5:14b on 2026-09-18,
using this article's own text rather than the other coverage of the
same event (that is the story summary below).
Story summary
In September, cybersecurity researchers at Hacktron AI used Anthropic’s Claude chatbot to breach OpenAI’s internal systems, gaining access to employee accounts and an internal GitHub repository. The researchers discovered a flaw in OpenAI's public help forum hosted by Discourse, which they exploited within 72 hours. They reported the issue immediately, and OpenAI fixed it within 14 hours while paying Hacktron a $6,500 bounty. The incident highlights how quickly AI can be repurposed for cyberattacks, despite efforts to ensure ethical use through bug-hunting programs like this one.
Written for “AI Breach Risks” on 2026-10-05,
grounded in this article and the 7 other(s) covering the same event.
Claims extracted
15
claim-shaped sentences
Uncertain
13%
2 of 15 hedged
Leaning
Leans right
of the writing, not the subject · beta estimate
Correction & hedging signals
68.3
corrections and hedging in what we collected;
not a measure of accuracy
Outlets on this story
8
Technology
Narrative spread
1
articles carrying this framing
Cybersecurity researchers have hacked into OpenAI with the help of Anthropic’s Claude chatbot, in the latest example of security issues at the company.
asserted
researchers → hack → company
A team at a US-based startup compromised a number of OpenAI employees’ ChatGPT accounts, starting a process that enabled them to access their target’s software cache – and potentially more.
asserted
that → base → cache
“The scope of what we could theoretically access was huge,” said researchers at Hacktron AI.
uncertain
researchers → access → AI
Initially, the research team used Claude, which can generate code for hackers, to access ChatGPT accounts via an OpenAI staff discussion forum hosted by the Discourse platform.
asserted
which → use → platform
They then made a harmless “pull request” – an attempt to change the code in a file – to OpenAI’s service on the GitHub software repository.
asserted
They → make → repository
Hacktron reported the hack to OpenAI, having carried out the operation under an OpenAI programme that rewarded ethical hackers for testing its systems.
asserted
that → report → systems
The researchers stressed that they had access to, but did not download, the code from the GitHub repository.
asserted
they → stress → repository
Despite initial use of Claude, the researchers said they were largely using OpenAI’s own cutting edge GPT-5.6 Sol model to carry out the hack, which was first reported by the Wall Street Journal.
asserted
which → say → Journal
An OpenAI spokesperson said: “We thank the researchers for contacting us and sharing their findings”, adding that the company had addressed the vulnerabilities that had been exploited.
Hacktron said AI tools had made a once-complex hacking task far easier and drastically shortened the time needed to plan and execute an attack.
asserted
task → say → attack
This is a common refrain from cybersecurity experts when discussing the impact of AI.
asserted
This → discuss → AI
“Work that once required a well-resourced team and months of effort can now be compressed into days,” said Hacktron, which received a $6,500 payment from OpenAI under the company’s bug bounty programme.
asserted
which → require → programme
The hack is the latest safety incident at OpenAI, which revealed in July that a “swarm” of agents – the term for AI tools capable of carrying out tasks autonomously – powered by its technology had hacked the AI startup Hugging Face during a cybersecurity test.
asserted
swarm → reveal → test
This week the San Francisco-based company revealed six more examples of “unexpected or concerning” actions by its technology, and warned that the pace of development could not continue at “maximum speed for much longer”.
Anthropic made a fresh call at the weekend for a slowdown in AI development, which was supported by OpenAI, Google DeepMind and Elon Musk.
uncertain
which → base → OpenAI
also repeated warnings that unrestrained AI development posed an existential threat, concerns that some experts are sceptical about.
asserted
experts → repeat → that
Donald Trump has rejected calls for a slowdown, citing a need to stay ahead of China’s AI industry and dismissing “negative forces … bringing up things that won’t happen”.
asserted
that → reject → things
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