Have-I-Been-Pwned is a technology platform tracked across 1 threat cluster and 1 intelligence report mention on ThreatCluster. First observed February 6, 2026; most recent activity February 6, 2026.
Substack has disclosed a security breach that exposed user email addresses and phone numbers due to a hack that occurred in October 2025. The breach went undetected for four months, with CEO Chris Best confirming that…