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Salesforce-owned PaaS vendor Heroku and GitHub have both warned that compromised OAuth user tokens were likely used to download private data from organizations using Heroku and continuous integration and testing service Travis CI, according to statements issued late last week.
It’s unlikely that GitHub itself was compromised, according to the ubiquitous source code repository’s blog post, since the OAuth tokens in question aren’t stored by GitHub in usable formats, and more likely that they were taken from Heroku and Travis CI’s applications that use the OAuth framework for authentication.