CVE-2026-84387 Command injection in FortiSandbox
Attackers can execute unauthorized code or commands on Fortinet FortiSandbox appliances due to improper neutralization of special elements.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-84387?
CVE-2026-84387 is a medium-severity command injection vulnerability in Fortinet FortiSandbox, published on 8 Sep 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
An Improper Neutralization of Special Elements used in a Command ('Command Injection') vulnerability [CWE-77] vulnerability in Fortinet FortiSandbox 5.2.0, FortiSandbox 5.0.0 through 5.0.6, FortiSandbox 4.4.0 through 4.4.9, FortiSandbox 4.2 all versions may allow a privileged attacker to execute unauthorized code or commands via crafted HTTP requests.
Weakness: CWE-77
Which versions are affected by CVE-2026-84387?
How do I fix CVE-2026-84387?
No fix has been published for CVE-2026-84387 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-84387 being exploited?
There is no known exploitation of CVE-2026-84387 in the wild and no public exploit code.
Sources
Also known as GHSA-jq5j-gp3m-3mrh.