GHSA-9RJW-3GWP-F59V Coder's workspace app upsert allows cross-workspace agent rebinding via user-controlled app ID

Summary UpsertWorkspaceApp overwrites an existing app's agentid on a primary-key conflict and insertAgentApp accepts the app ID from the provisioner's CompleteJob payload without verifying it belongs to the workspace being built. CompleteJob runs under dbauthz.AsProvisionerd so the authorization...