🌐 Networking

SSH Rekey

Key re-exchange, a normal SSH feature that lets either side refresh the session's encryption keys mid-connection without disconnecting. Because it is a transport-level operation that can occur during authentication, flawed state handling around a rekey can let an attacker reach the post-authentication phase early, as in CVE-2026-67279.

📚 Deep Dive

Learn Article

How SSH Servers Get Tricked Into Skipping Authentication

SSH authentication bypasses rarely break the cryptography. Three real failure modes: doing the protocol steps out of order, verifying a signature incompletely, and trusting the shape of a username.

intermediate 5 min read

Back to Glossary