598 people exposed in the Force Ouvrière UD 75 data leak

On 15 January 2026, the Paris Departmental Union of Force Ouvrière (UD 75) — the Paris-area branch of one of France's main trade-union confederations — was reported to have exposed the personal data of 598 people associated with the union.

According to the breach tracker that reported the incident, the leaked material originated from an export batch drawn from the union's membership management system, rather than from a live intrusion into the application itself. This is a distinct event from the much larger national Force Ouvrière breach disclosed in April 2026, which affected roughly 161,000 members.

The exposed records related to people connected to the UD 75 branch, a category of data that is considered sensitive because trade-union affiliation reveals protected information under French and EU data-protection law and can be misused for targeted phishing, intimidation, or political profiling.

• Identities of roughly 598 people linked to the union
• Data drawn from a membership/management-system export batch

At the time of reporting, the scale beyond the 598 affected individuals, the precise data fields, and any remediation or regulatory notification were not publicly confirmed, and the status of the incident remains unknown.