Have I Been Pwned: Substack Data Breach In October 2025, the publishing platform Substack suffered a data breach that was subsequently circulated more widely in February 2026. The breach exposed 663k account holder records containing email ...

#Substack #DataBreach

In October 2025, the #publishing platform Substack suffered a data breach that was subsequently circulated more widely in February 2026. The breach exposed 663k #accountholder records.

Compromised Data:
#Emailaddresses
#Phonenumbers

haveibeenpwned.com/Breach/Subst...