Embodiments are directed to revoking user sessions using signaling. In one scenario, an identity platform operating on a computer system receives an indication indicating that a user's login account has been compromised, where the user's login account has an associated login session and corresponding session artifact that is valid for a specified amount of time. The identity platform generates a signal indicating that the login session is no longer trusted and that the user is to be re-directed to the identity platform to re-authenticate and renew the session artifact and provides the generated signal to various relying parties including at least one relying party that is hosting the login session for the user.