Mistral denies a fresh security breach, but the code on sale looks a lot like May's leak
- Seller claims to be offering Mistral AI's full source code and says the company was breached again after May 2026 attack
- Mistral says an investigation found no evidence of new unauthorized access but has not stated whether the listed code is genuine
- No customer data has surfaced in analyzed samples, and nobody has shown files created after the May incident
A seller on a cybercrime forum says French giant Mistral AI has been hacked again and is offering what they call the company's full source code for sale.
The September 16 2026 post by an account using the handle "mrwho" consists of a listing titled "Selling mistral.ai Source Code" on an English-language cybercrime forum, according to The CyberSec Guru, pricing the material in Monero only before it attempted to steer potential buyers to Session or Telegram.
Mistral AI's own team has refutedthis, stating it has "found no evidence...
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