---
title: "Data breach at Medialog"
description: "Medialog, a French publisher of management software for hotels and restaurants, suffered an intrusion into its platform. Unauthorised access lasted from 27 September 2026 to 5 October 2026. The main extraction, about 135 GB, consists of complete guest records from roughly 1,500 establishments. Accor"
canonical: https://inyourgeek.com/en/fuites-de-donnees/2026-10-06-medialog
type: fuite-de-donnees
author: "Sébastien Soulier"
publisher: "InYourGeek"
language: en
datePublished: 2026-10-06
dateModified: 2026-10-06
---
# Medialog

Data breach — High

Medialog, a French publisher of management software for hotels and restaurants, suffered an intrusion into its platform. Unauthorised access lasted from 27 September 2026 to 5 October 2026. The main extraction, about 135 GB, consists of complete guest records from roughly 1,500 establishments. According to the publisher, it includes identity, date, city and country of birth, nationality, postal address, email addresses, phone numbers, booking and stay details, room number and deposit amount. No payment card data is said to have been accessible from the affected applications. According to FrenchBreaches, hotel guests are reportedly already being approached on WhatsApp.

Civil-status details combined with contact information and stay details allow a malicious party to craft highly credible phishing messages referring to a real booking.

| Fact | Value |
| --- | --- |
| Disclosed on | October 6, 2026 |
| Incident dated | September 27, 2026 |
| Sector | Digital services |
| Country | France |
| Cause | Undisclosed |
| Severity | High |
| Status | Confirmed |

## Exposed data

- Full name
- Date of birth
- Postal address
- Email address
- Phone number
- Order history
- Other personal data

## What you can do

- Expect phishing attempts quoting your name and this company. A message that knows your details is not legitimate for that reason.
- 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

- [Medialog](https://frenchbreaches.com/alertes/medialog-muwvy9ney4pypgf3qff) — FrenchBreaches
- [Medialog : fuite de données visant les clients d'environ 1 500 établissements](https://fuitesinfos.fr/article/2026-10-06-medialog) — Fuites Infos
- [Un logiciel utilisé par les hôtels piraté, 135 Go de données clients volés](https://www.clubic.com/actualite-632941-un-logiciel-utilise-par-les-hotels-pirate-135-go-de-donnees-clients-voles.html) — Clubic
- [Medialog : des réservations d'hôtels exposées après une cyberattaque](https://www.cyberattaque.org/medialog-des-reservations-dhotels-exposees-apres-une-cyberattaque/) — cyberattaque.org

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

---

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