Story perspectives
Substack Data Breach Exposes User Emails, Phone Numbers
2/6/2026
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Story summary
- Substack Chief Executive Officer Chris Best said a data breach affected user email addresses and phone numbers, with the breach occurring in October and identified in February.
- Substack said credit card numbers and passwords were not compromised.
- Best said Substack has begun an investigation and fixed the issue and it has not disclosed how many users are affected.
- Substack has over 50 million active subscriptions.
