CVE-2026-42453 Termix: Command injection in extractArchive/compressFiles via double-quote escaping bypass
Attackers can execute arbitrary commands on remote SSH hosts via Termix file manager endpoints due to improper shell command construction.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-42453?
CVE-2026-42453 is a high-severity command injection vulnerability in Termix-SSH Termix, published on 8 May 2026. An attacker can exploit it over the internet without logging in, 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 version 2.1.0, the extractArchive and compressFiles endpoints in file-manager.ts use double-quoted strings for shell command construction, unlike all other file manager operations which use single-quote escaping. Double quotes allow $(command) substitution, enabling command injection on the remote SSH host. This issue has been patched in version 2.1.0.
Weakness: CWE-77
Which versions are affected by CVE-2026-42453?
How do I fix CVE-2026-42453?
No fix has been published for CVE-2026-42453 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-42453 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-42453 exists.
Sources
Also known as GHSA-rvg4-7vvq-9c2w.