CVE-2026-65638 Improper escaping of a request URL in ConfigServer Security & Firewall allows an unauthenticated remote attacker to execute arbitrary comman
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-65638?
CVE-2026-65638 is a critical vulnerability in ConfigServer Security & Firewall, published on 10 Sep 2026.
Official description
Improper escaping of a request URL in ConfigServer Security & Firewall allows an unauthenticated remote attacker to execute arbitrary commands as the CSF service account via shell command injection.
The vulnerability affects versions of the software originally distributed by ConfigServer, as well as versions of the WebPros-maintained fork that contain the vulnerable code. WebPros has addressed the vulnerability in version 16.30. Other forks or independently maintained versions of ConfigServer Security & Firewall (CSF) may also be affected and should be evaluated independently.
Weakness: CWE-78
Which versions are affected by CVE-2026-65638?
How do I fix CVE-2026-65638?
No fix has been published for CVE-2026-65638 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-65638 being exploited?
There is no known exploitation of CVE-2026-65638 in the wild and no public exploit code.
Sources
Also known as GHSA-8qv3-jfg8-cjvp.