---
title: "Data breach at Ville de Libercourt"
description: "The town of Libercourt (Pas-de-Calais, France) was hit at the end of August 2026 by a ransomware attack claimed by the Kairos group, which says it exfiltrated 817 GB of data. The municipality confirmed on 15 September 2026 that personal data had been exfiltrated, without yet detailing its exact natu"
canonical: https://inyourgeek.com/en/fuites-de-donnees/2026-09-15-ville-de-libercourt
type: fuite-de-donnees
author: "Sébastien Soulier"
publisher: "InYourGeek"
language: en
datePublished: 2026-09-15
dateModified: 2026-09-15
---
# Ville de Libercourt

Data breach — Critical

The town of Libercourt (Pas-de-Calais, France) was hit at the end of August 2026 by a ransomware attack claimed by the Kairos group, which says it exfiltrated 817 GB of data. The municipality confirmed on 15 September 2026 that personal data had been exfiltrated, without yet detailing its exact nature or volume, and reported the incident to the CNIL and ANSSI. Documents posted on the group's leak site reportedly include identity documents and pay slips. Residents with an online account for municipal services are urged to stay alert to phishing attempts.

The exposed identity documents and pay slips could facilitate identity theft or targeted phishing attempts against the people concerned.

| Fact | Value |
| --- | --- |
| Disclosed on | September 15, 2026 |
| Sector | Public sector |
| Country | France |
| Cause | Ransomware |
| Severity | Critical |
| Status | Confirmed |

## Exposed data

- Identity document
- Employment data

## What you can do

- These documents enable identity theft, and cannot be reissued at will. Keep the notification letter: it proves where the leak came from if an account is opened in your name.
- You can ask the organisation exactly what was exposed about you (right of access), and complain to the DPA if no answer comes within a month.

## Sources

- [Ville de Libercourt](https://frenchbreaches.com/alertes/ville-de-libercourt-mu3s726lzo8j6uv1ta) — FrenchBreaches
- [Ville de Libercourt : 817 Go de données revendiqués après une cyberattaque](https://www.cyberattaque.org/ville-de-libercourt-817-go-de-donnees-revendiquesapres-une-cyberattaque/) — Cyberattaque.org
- [Libercourt. La mairie visée par une cyberattaque](https://www.horizonactu.fr/actualite-49677-libercourt-la-mairie-visee-par-une-cyberattaque) — Horizon Actu

_Entry built from the cited sources after a corroboration check, then reviewed before publication._

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