OpenSSH 10.6 Upgrade Checklist: What Breaks and What to Do About It (2026)
OpenSSH 10.6 landed on October 6, 2026, and unlike most point releases, this one can break things on your servers. It disables part of SSH compression to close a plaintext-recovery side channel, refuses certain usernames on the command line, enables a post-quantum signature algorithm that invalidates older experimental keys, and starts deprecating scp -R. It … Read more