Git rebase is powerful. It can create a clean, linear commit history, streamline reviews, and speed up merging. But when platform security is ignored, every rebase is a possible breach point. A simple oversight in permissions, audit trails, or authentication can turn a codebase into an attack vector.
The problem starts when teams treat version control as an isolated tool. Git is not the security boundary—your platform is. If developers can rewrite history without traceability, you lose forensic insight. If CI/CD tokens or webhooks are exposed during rebase operations, attackers can slip in malicious commits under clean commit signatures.
Rebase modifies commit hashes. If those commits pass through insecure channels, tampering can go unnoticed. Signed commits help, but only if the platform enforces signature verification and logs every rewrite. Without consistent enforcement, the signature check is cosmetic, not protective.