French Crypto Data Breach Exposes 678,000 Tax Records Amid Wrench Attacks

A cyberattack on France’s tax authority has exposed personal and financial records belonging to roughly 678,000 people, and security researchers warn the leak could hand criminals a ready-made list of wealthy targets in a country already grappling with a wave of violent crime against crypto holders. The French crypto data breach concern stems less from the hack itself and more from what happens when stolen financial profiles collide with an already dangerous pattern of physical attacks on crypto owners across France.

Key takeaways

• Hackers breached France’s General Directorate of Public Finances in late June, exposing data tied to around 678,000 people, according to the French Finance Minister and breach-tracking platform FrenchBreaches.
• Leaked records reportedly include names, birthdates, home addresses, phone numbers, email addresses, and tax income figures.
• Nearly 27,000 affected individuals had incomes above €100,000, while 386 reported more than €1 million and eight exceeded €10 million.
• The stolen database is reportedly being sold on dark web marketplaces, and an attacker using the alias ZeroBytes claims responsibility.
• Chainalysis recorded 30 violent crypto attacks in France during the first half of 2026 alone, totaling more than $30 million stolen — putting the year on pace to beat 2025’s record.

Massive French tax data breach impacts nearly 678,000 people

France’s Finance Minister confirmed that a hacker infiltrated the General Directorate of Public Finances sometime in late June, pulling data tied to both individual and professional taxpayers. FrenchBreaches, a platform that tracks cyberattacks across the country, pegs the number at 678,437 people — roughly 1% of France’s entire population. That figure is still provisional, since the investigation into the scope of the intrusion remains ongoing.

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