CVE-2026-53546 Termix: Missing authorization in SSH host credential resolution exposes stored credentials
An authenticated low-privileged user can access other users' stored SSH credentials due to missing authorization checks in host resolution.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-53546?
CVE-2026-53546 is a critical missing authorization vulnerability in Termix-SSH Termix, published on 19 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Termix is a web-based server management platform with SSH terminal, tunneling, and file editing capabilities. Prior to 2.3.2, the terminal WebSocket accepts a user-controlled hostConfig.id and src/backend/ssh/host-resolver.ts resolves that host without requiring ownership or explicit access. When no credential is shared with the requester, resolveHostById performs an owner credential fallback, and src/backend/ssh/terminal.ts combines that credential with attacker-controlled ip, port, and username values. An authenticated low-privileged user can therefore make Termix authenticate to an attacker-controlled SSH server and disclose another user's stored SSH password or private-key material while the victim user's data key is unlocked. This issue is fixed in version 2.3.2.
Which versions are affected by CVE-2026-53546?
How do I fix CVE-2026-53546?
No fix has been published for CVE-2026-53546 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-53546 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-53546 exists.
Sources
Also known as GHSA-57gp-39c7-4g9r.