Substack said that customer data was accessed in October 2025, but wasn't discovered until early February.

Substack won't share official numbers, but it seems like a pretty significant data breach.

According to The Guardian, several newsletters promoting Nazi ideology and antisemitic conspiracy theories were operating on ...

Substack, the hugely popular online content platform with 50 million active subscribers, has confirmed it has been hacked. Here’s what you need to know.

The hacker claims to have stolen nearly 700,000 Substack user records, including email addresses and phone numbers.

Lynch Carpenter is a national class action law firm with offices in Pennsylvania, California, and Illinois. Our firm has represented millions of clients in data privacy matters for more than a decade ...

Newsletter platform Substack has confirmed it suffered a security incident, leading to the compromise of users’ email addresses and phone numbers. Chris Best, the CEO of Substack, notified users of ...

Well, shit. I had several Substack subscriptions that I enjoyed. However, continuing to read those subscriptions would be like continuing to go to a Nazi bar because there are some entertaining ...