France launches Mistral AI to investigate government system vulnerabilities

The French Tax Administration was hacked, and the government used AI to reshape its cybersecurity strategy.

Faced with the severe situation of frequent loopholes in the administrative system and leakage of sensitive data, the French government decided to use artificial intelligence technology to deeply strengthen digital audit capabilities. This response points to the current threat that transcends the public system-that stolen information could be used in social engineering attacks, directly targeting citizens, including cryptocurrency holders. Behind this strategic shift, the core issue concerns France's digital sovereignty.

Incident Summary

France enabled Mistral AI to detect public service vulnerabilities and explicitly ruled out OpenAI; intrusion testing relied on the "Our AI" ecosystem and SecNumCloud certified data centers to ensure digital independence; massive leaks were caused through compromised VPNs, exposing nearly 700,000 taxpayers 'personal and tax data; stolen information was used to target phishing and physical extortion threats against the encrypted community.

The Ministry of Finance's autonomous response and Mistral AI's exclusive choice

On Tuesday, August 18, 2026, after the Paris Ministerial Conference, the French government took a major technology shift to strengthen the resilience of its IT infrastructure. At this time, nearly 700,000 taxpayers are facing threats from cyber attacks against the French Revenue Service (DGFiP). Budget Minister David Amiyeer announced that the country will use artificial intelligence-based tools to proactively identify and test vulnerabilities in its own public service systems.

In order to complete the sensitive task of this offensive audit, France deliberately excluded American giants and chose local companies instead. Amiel was clear in front of the media. He said that the government would convene so-called sovereign AI companies,"such as Mistral," and clearly added: "This excludes OpenAI." This policy direction is a direct continuation of the "Our AI" plan announced by the Ministry of Budget a few months ago. The plan already aims to deploy sovereign tools in government services, particularly through "assistant" systems-designed by the Interdepartmental Digital Bureau (DINUM), based on a model from Paris-based company Mistral AI, and hosted exclusively in SecNumCloud-certified data centers.

By delegating security breach detection to Mistral, which is backed by equipment manufacturer ASML, Paris has refused to expose its own mapping of IT vulnerabilities to technologies outside Europe. This preventive engineering option directly responded to the impact of the tax server intrusion that was officially announced a few days ago. To understand the scope of this institutional shift, the new government audit principles now consist of three pillars:

● Exclusive use of local companies: the state entrusts French actors such as Mistral AI to audit its own systems, not relying on U.S. companies;
● Strictly exclude third-party models: Decided to formally exclude OpenAI to avoid transferring vulnerability mapping to servers subject to extraterritorial laws;
● Anchoring certification infrastructure: The integration is based on the "Our AI" program and hosted in a SecNumCloud certified data center.

Huge IT vulnerability in the French Revenue Service

The trigger for this government reorganization came from an unprecedented security breach in the French General Revenue Service (DGFiP). The attack was exposed by the Ministry of Economy and Finance via on-chain data last Thursday, and hackers used stolen credentials to breach internal VPN access rights and access taxpayer search tools. The breach was discovered and blocked at the end of June 2026, resulting in the theft of nearly 700,000 people's documents, including names, full contact details, tax access numbers, withheld tax rates and communication records. The situation worsened on Monday, when DGFiP Director General Amelie Verdier confirmed that her team had just discovered a second data breach and was currently evaluating it.

Although the tax department stated that passwords and login credentials were not stolen, once such information is combined with the cryptocurrency financial ecosystem, its toxicity is particularly prominent. The disclosure of physical addresses and detailed tax data provides an ideal ground for highly targeted phishing attacks and identity theft. The loophole echoed concerns expressed by Pavel Durov earlier this year. In April 2026, the founder of Telegram publicly pointed out flaws in the public register, revealing that France had recorded 41 incidents of kidnapping or attempted extortion against cryptocurrency holders in the first three and a half months of that year.

The balance between sovereign ambitions and data protection obligations

In addition to the Treasury's emergency response, this cooperation with local ecosystems also raises important questions about the future management of critical European infrastructure. By refusing to provide American models with a catalog of public administration vulnerabilities, France is trying to impose strict confidentiality standards under European law. However, this automated testing method by sovereign AI must prove effective in responding to human operating patterns that are often based on leaks of legitimate credentials-algorithmic code analysis alone is often not enough to plug such vulnerabilities. The battle between the analytical capabilities of large language models and the reality of human risks will be decisive.

In the future, France's response could set a precedent for the EU to require audits of critical systems to be performed by artificial intelligence that is strictly limited by local legal sovereignty. However, while Mistral AI's technology provides safeguards against information leakage to third parties, it cannot retroactively erase hundreds of thousands of taxpayer files that are now in circulation. For investors and capital holders, the urgency is no longer just about protecting their wallets at a technical level, but about maintaining continued vigilance against social engineering attacks that become extremely effective due to the unexpected exposure of administrative identities.