Identrail Cross-tenant IDOR: Client-supplied GitHub App installation_id is bound to the caller's workspace without ownership verification
identrail's GitHub App connection-completion endpoint binds a fully client-supplied installation_id to the caller's workspace without verifying that the installation belongs to, or was installed by, the workspace that initiated the connect flow. identrail then mints a GitHub App installation access token for the supplied installation_id using the app's own JWT, so an authenticated tenant can link any other identrail customer's GitHub App installation into their own workspace and read that …