Substack said that customer data was accessed in October 2025, but wasn't discovered until early February.
Publishing platform Substack has disclosed a data breach that leaked nearly 700,000 user records after an unauthorized third-party exploited a security flaw.
The hacker claims to have stolen nearly 700,000 Substack user records, including email addresses and phone numbers.
Substack states that the security flaw has now been fixed and that a full investigation is underway. There are currently no ...
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 ...
Substack has confirmed a major data breach that exposed emails and phone numbers for approximately 700,000 users, with the ...
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Michael Burry just started a massive group chat on Substack, and it's as chaotic as you'd expect
Michael Burry of "The Big Short" fame started a group chat for all of his paid subscribers on Substack, and the jokes and memes are rolling in.
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.
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