CVE-2026-67599 ClearOS 7.9 OS Command Injection via Log Viewer filter parameter
Authenticated attackers can execute arbitrary commands and escalate to root via OS command injection in the ClearOS Log Viewer filter parameter.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-67599?
CVE-2026-67599 is a high-severity command injection vulnerability in ClearFoundation ClearOS, published on 3 Aug 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
ClearOS 7.9 contains an OS command injection vulnerability in the Log Viewer component that allows authenticated attackers to execute arbitrary commands by submitting unsanitized input through the filter parameter, which is interpolated directly into a shell command in File.php. Attackers can inject command substitution payloads into the filter parameter to execute arbitrary commands as the webconfig user, and due to extensive NOPASSWD sudo privileges granted to that user by default, immediately escalate to root.
Weakness: CWE-78
Which versions are affected by CVE-2026-67599?
How do I fix CVE-2026-67599?
No fix has been published for CVE-2026-67599 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-2026-67599 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-67599 exists.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-pfmm-hj96-f74x.