Recently we've been made aware of a vulnerability which would have allowed an attacker to gain access to various Sentry metadata. This information includes various account details, as well as credentials for integrations and Sentry's web API (both keys and auth tokens). We have no reason to believe this information was compromised, but are addressing that possibility as aggressively as we can.
You should do the following as soon as possible:
Any existing API keys or authentication tokens used with our web API (such as to upload release artifacts) should be rotated. Create a new key or token, update your systems, and then remove the previously used keys.