CVE-2026-26068 emp3r0r Agent-Controlled Metadata to Operator RCE (tmux Command Injection)
An attacker can execute arbitrary commands on the operator host by injecting malicious metadata during agent check-in.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-26068?
CVE-2026-26068 is a critical command injection vulnerability in jm33-m0 emp3r0r, published on 12 Feb 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
emp3r0r is a stealth-focused C2 designed by Linux users for Linux environments. Prior to 3.21.1, untrusted agent metadata (Transport, Hostname) is accepted during check-in and later interpolated into tmux shell command strings executed via /bin/sh -c. This enables command injection and remote code execution on the operator host. This vulnerability is fixed in 3.21.1.
Which versions are affected by CVE-2026-26068?
It affects 1 product.
Products include Jm33-M0 Emp3r0r.
How do I fix CVE-2026-26068?
No fix has been published for CVE-2026-26068 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-2026-26068 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-26068 exists.
Other vulnerabilities in jm33-m0 emp3r0r
Sources
Also known as GHSA-h5p4-4xp4-vjpp.