CVE-2026-39808 Fortinet FortiSandbox OS Command Injection
An attacker can execute unauthorized code or commands on Fortinet FortiSandbox due to improper neutralization of special elements in OS commands.
- Exploited in the wild
- Since 16 Jul 2026
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-39808?
CVE-2026-39808 is a critical command injection vulnerability in Fortinet Fortisandbox, published on 14 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A improper neutralization of special elements used in an os command ('os command injection') vulnerability in Fortinet FortiSandbox 4.4.0 through 4.4.8 may allow attacker to execute unauthorized code or commands via <insert attack vector here>
Weakness: CWE-78
Which versions are affected by CVE-2026-39808?
It affects 1 product.
Products include Fortinet Fortisandbox.
How do I fix CVE-2026-39808?
No fix has been published for CVE-2026-39808 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 19 Jul 2026.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-39808 being exploited?
Yes. Attackers have exploited CVE-2026-39808 in the wild since at least 16 Jul 2026.
Public exploit code: 1 Nuclei template and 7 proofs of concept on GitHub.
Other vulnerabilities in Fortinet Fortisandbox
Sources
Also known as GHSA-wfjv-vrx5-2cf2.