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

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

Substack, the hugely popular online content platform with 50 million active subscribers, has confirmed it has been hacked.

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

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

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

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

If you have accounts on any of these services, now's a good time to check your security settings. Plus more from a busy week in cybersecurity chaos.

"We're moving quickly," Farrah Storr, head of international at Substack, tells THR after hiring Mark Swierszcz as its new ...

Exclusive: Site takes a cut of subscriptions to content that promotes far-right ideology, white supremacy and antisemitism ...

On the heels of Instagram rolling out a Reels app for connected TV, newsletter creators can now offer videos and livestreams ...

The report says that one of the newsletters — NatSocToday — with 2,800 subscribers, features a swastika as its profile ...