CVE-2026-67402 Command injection in ConfigServer Security & Firewall
Remote attackers can execute arbitrary commands via insecure CGI mapping in CSF Messenger HTTPS mode, requiring an upgrade to secure the system.
- 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-2026-67402?
CVE-2026-67402 is a critical command injection vulnerability in ConfigServer Security & Firewall, published on 3 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An insecure Apache configuration in ConfigServer Security & Firewall maps /usr/bin as CGI programs through the Messenger v3 HTTPS virtual host. A remote unauthenticated attacker whose address is blocked can request a mapped executable and run arbitrary commands as the Apache user. The vulnerability affects installations where CSF Messenger v3 and its HTTPS mode are enabled. WebPros addressed the vulnerability in version 16.31.
Weakness: CWE-552
Which versions are affected by CVE-2026-67402?
How do I fix CVE-2026-67402?
No fix has been published for CVE-2026-67402 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-2026-67402 being exploited?
There is no known exploitation of CVE-2026-67402 in the wild and no public exploit code.
Sources
Also known as GHSA-88ch-qhvf-3vfj.