Tchap breach exposes 73k French civil servants’ data after account hijack
France’s official encrypted messaging service Tchap was compromised on June 7, 2026 after a malicious actor hijacked a user account. The breach exposed personal data for 73,467 public‑sector users and gave the attacker access to public‑room messages, underscoring the risk of relying on single‑sign‑on accounts for secure communications.