CVE-2026-39808

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>

Score

CVSS 3.1 9.8 Critical

Status

Analyzed - psirt@fortinet.com

Published

2026-04-14

Last modified

2026-10-26

Known exploited (CISA KEV)

since 2026-07-16, action due 2026-07-19: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

Weaknesses

CWE-78

Affected products

• Fortisandbox (Fortinet)
• Fortisandboxpaas (Fortinet)

References

• https://fortiguard.fortinet.com/psirt/FG-IR-26-100
• https://github.com/samu-delucas/CVE-2026-39808
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-39808