Data Breach Exposes Sensitive Vaccination Records on French Platform MesVaccins.net

A data breach involving MesVaccins.net, a French vaccination records platform operated by Syadem, exposed sensitive vaccination data in 2026. The incident involved unsecured databases containing vaccination certificates, personal identifiers (names, birthdates), and medical details of individuals. The exposed data was accessible without authentication due to misconfigured cloud storage, though the exact number of affected records was not specified. The breach was publicly disclosed by cybersecurity researchers, with no evidence of malicious exploitation mentioned. No CVE IDs or specific technical vulnerabilities were cited in the report.