Newsletter platform Substack is notifying users of a data breach after attackers stole their email addresses and phone numbers in October 2025. [...]

Substack confirmed a data breach after a hacker leaked data from nearly 700,000 users, including email addresses and phone numbers. Substack is an...

Substack confirmed a data breach after a hacker leaked data from nearly 700,000 users, including email addresses and phone numbers. Substack is an...

Substack confirmed a data breach after a hacker leaked data from nearly 700,000 users, including email addresses and phone numbers. Substack is an...

Media platform Substack has disclosed a data breach that exposed email addresses, phone numbers, and internal metadata of an unknown number of...

Photo-sharing platform Flickr is notifying users of a potential data breach after a vulnerability at a third-party email service provider exposed...

Photo-sharing platform Flickr is notifying users of a potential data breach after a vulnerability at a third-party email service provider exposed...

Substack, one of the services focused on email newsletters, has now confirmed that their service experienced an incident of user data leakage to third...

In October 2025, the publishing platform Substack suffered a data breach that was subsequently circulated more widely in February 2026. The breach...

Hackers stole email addresses and other personal information from 1.4 million accounts after breaching the systems of automated investment platform...