CVE-2026-54591

Red Hat statement

This Important flaw in AsyncSSH's SCP client allows a malicious SSH server to perform arbitrary file writes on the client's filesystem through directory traversal. This occurs when an AsyncSSH SCP client connects to a compromised or malicious server, enabling unauthorized data modification or system disruption on the client.

Red Hat mitigation

The core risk of this flaw is that the malicious server uses a path traversal trick to write files where it shouldn't on your client (like overwriting /etc/shadow or critical system binaries). By making the container's root filesystem read-only, you completely neutralize this attack. Even if the vulnerability is triggered, the container's kernel will block the unauthorized write attempt.