[bpeebles]

I had posted the most relevant paragraphs in https://news.ycombinator.com/item?id=31255450 but it probably should be here too:

>On April 7, 2022, a threat actor obtained access to a Heroku database and downloaded stored customer GitHub integration OAuth tokens. Access to the environment was gained by leveraging a compromised token for a Heroku machine account. According to GitHub, the threat actor began enumerating metadata about customer repositories with the downloaded OAuth tokens on April 8, 2022. On April 9, 2022, the attacker downloaded a subset of the Heroku private GitHub repositories from GitHub, containing some Heroku source code.

...

> Separately, our investigation also revealed that the same compromised token was leveraged to gain access to a database and exfiltrate the hashed and salted passwords for customers’ user accounts. For this reason, Salesforce is ensuring all Heroku user passwords are reset and potentially affected credentials are refreshed. We have rotated internal Heroku credentials and put additional detections in place. We are continuing to investigate the source of the token compromise.