Substack data breach exposed user email addresses and phone numbers for months before CEO Chris Best confirmed the October ...

Substack has confirmed a major data breach that exposed emails and phone numbers for approximately 700,000 users, with the ...

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 company has emailed affected users after a dark web source claims the data of almost 700,000 users was compromised.

Newsletter platform Substack is notifying users of a data breach after attackers stole their email addresses and phone numbers in October 2025. Although the incident occurred four months ago, CEO ...

Newsletter platform Substack has admitted that an intruder swiped user contact details months before the company noticed, forcing it to warn writers and readers that their email addresses and other ...

Substack, a creator-focused subscription and publishing platform, has suffered a data breach affecting an unknown number of creators and subscribers on its platform. The company confirmed the incident ...

Popular newsletter platform Substack is the latest company to confirm it experienced a security incident, in which users' email addresses and phone numbers were exposed. According to an email sent to ...

Substack is notifying some users that the email addresses and phone numbers linked to their accounts were exposed in a “security incident” last year. In an email to account holders, Substack CEO Chris ...

The breach happened in October, but was detected by Substack on February 3rd. The breach happened in October, but was detected by Substack on February 3rd. is a news writer focused on creative ...