OS Command Injection through API endpoint

unknownCVE-2026-39808

CVSSv3 Score: 9.1 An Improper Neutralization of Special Elements used in an OS Command ('OS command injection') vulnerability [CWE-78] in FortiSandbox may allow an unauthenticated attacker to execute unauthorized code or commands via crafted HTTP requests. Revised on 2026-04-14 00:00:00

CSIRTS triage

vendor: Fortinet product: FortiSandbox Remote code execution

What: An unauthenticated attacker may execute unauthorized commands via crafted HTTP requests.
Who is affected: Users of FortiSandbox.
Urgency: Remediation is critical due to the high severity of potential exploitation.
Action: Apply security patches as soon as they are available.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: Fortinet FortiGuard PSIRT (INTL · vendor-psirt · site)
Severity: unknown
Published: 2026-04-14
Exploitation: Not in CISA KEV at last sync

Original advisory: https://fortiguard.fortinet.com/psirt/FG-IR-26-100

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Elevated exploitation riskCVE-2026-3980848.7% 30-day exploitation probability — well above the norm. Schedule remediation this cycle. Riskier than 99% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-39808	coverage & exploitation status	NVD · CVE.org

Recent advisories for OS Command Injection

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

highCVE-2025-30007: HestiaCP before 1.9.5 contains an authenticated OS command injection vulnerability that allows…nvd · 2026-07-10
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highGHSA-w9mx-xmg4-gc4r: laravel-backup-restore has an OS Command Injection during database restoreghsa · 2026-07-09
unknownCVE-2026-0286: A command injection vulnerability in the management plane of Palo Alto Networks PAN-OS® softwar…nvd · 2026-07-09