The digital publishing platform Substack has told some of its users that their data was stolen in a security breach. The ...

Publishing platform Substack has disclosed a data breach that leaked nearly 700,000 user records after an unauthorized third-party exploited a security flaw.

Substack states that the security flaw has now been fixed and that a full investigation is underway. There are currently no ...

On the heels of Instagram rolling out a Reels app for connected TV, newsletter creators can now offer videos and livestreams to subscribers via Apple TV and Google TV. By Etan Vlessing Canada Bureau ...

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

If you’re impacted by the security incident, you’ll hear directly from the brand with an email from Substack's CEO.

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

Substack, a newsletter platform, has confirmed a data breach compromising user email addresses and phone numbers ...

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

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

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 ...

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