The Claude Desktop app gives you Claude Code with a graphical interface built for running multiple sessions side by side. From 1.2581.0 to before 1.4304.0, Claude Desktop's SSH remote development feature verified only whether a hostname existed in ~/.ssh/known_hosts without comparing the server's presented host key against the stored key. This allowed a network-positioned attacker to present an arbitrary SSH host key and have the connection silently accepted, enabling a man-in-the-middle attack on remote development sessions.
Successful exploitation required the attacker to be in a network position to intercept SSH traffic (e.g., via ARP spoofing, rogue Wi-Fi, or DNS poisoning) and the target hostname to already have an entry in the victim's known_hosts file. This vulnerability is fixed in 1.4304.0.
Attack Parameters
Impact Assessment
CVSS Vector v4.0
Vulnerable Products 1
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Anthropic Claude_Desktop
cpe:2.3:a:anthropic:claude_desktop:*:*:*:*:*:*:*:*
|
1.2581.0
|
1.4304.0
|