OS Command Injection in FortiSandbox - CVE-2026-39808
Published: April 15, 2026 / Updated: July 16, 2026
Vulnerability identifier: #VU126112
CSH Severity: Critical
CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-39808
CWE-ID: CWE-78
Exploitation vector: Remote access
Exploit availability:
The vulnerability is being exploited in the wild
Vulnerability details
The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.
The vulnerability exists due to improper neutralization of special elements used in an OS command. A remote unauthenticated attacker can send a specially crafted HTTP request and execute unauthorized code or commands on the system.
Affected software
FortiSandbox
How to mitigate CVE-2026-39808
Install updates from vendor's website.
FortiSandbox - update to 4.4.9