Git rebase changes commit history. It rewrites IDs, which can trigger CI/CD systems to re-check everything, including SSL/TLS certificates used in secure connections. If the certificates are expired, mismatched, or configured incorrectly, the rebase can expose silent problems that never surfaced during normal merges.
Certificate issues after a rebase usually happen when:
- The code references endpoints with outdated certificates.
- The build environment’s trust store is stale.
- The HTTPS configuration was tied to specific commit hashes or artifacts.
- Temporary certificates in development were never updated in the deployment script.
When security checks run against rebased code, they validate every part of the chain. Any link that fails—root CA, intermediate cert, hostname match—breaks. That break often blocks the push or stops deployment mid-stream.