Is CVE-2026-107656 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-107656 being exploited in the wild.

How severe is CVE-2026-107656?

Critical severity, with a CVSS score of 9.8, published 26 October 2026.

Which products and versions are affected?

Fortinet FortiSandbox 5.0.0 through 5.0.6, 4.4.0 through 4.4.9, 4.2 all versions; Fortinet FortiSandbox PaaS 5.0.0 through 5.0.6, 4.4 all versions, 4.2 all versions.

Is there a fix for CVE-2026-107656?

Yes: fixed in FortiSandbox 5.0.7 and above, 4.4.10 and above; FortiSandbox PaaS 5.0.7 and above. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-107656 attacked?

It is attacked over the network, in a network appliance.

Am I affected by CVE-2026-107656?

Check whether you run Fortinet FortiSandbox or Fortinet FortiSandbox PaaS at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-107656: Fortinet FortiSandbox authentication bypass in web management interface

CVE-2026-107656 · Severity: critical · CVSS 9.8 · Published 2026-10-26

FortiSandbox is a malware isolation and analysis platform used to inspect potentially dangerous files and URLs. An authentication bypass vulnerability in its web management interface allows unauthenticated attackers to bypass login controls and execute arbitrary code on the appliance by sending crafted HTTP requests. This could give attackers complete control over the sandbox environment and potentially compromise downstream networks.

Technologies: Fortinet FortiSandbox, Fortinet FortiSandbox PaaS. Vendors: Fortinet.

Quick answers

Is CVE-2026-107656 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-107656 being exploited in the wild.
How severe is CVE-2026-107656?: Critical severity, with a CVSS score of 9.8, published 26 October 2026.
Which products and versions are affected?: Fortinet FortiSandbox 5.0.0 through 5.0.6, 4.4.0 through 4.4.9, 4.2 all versions; Fortinet FortiSandbox PaaS 5.0.0 through 5.0.6, 4.4 all versions, 4.2 all versions.
Is there a fix for CVE-2026-107656?: Yes: fixed in FortiSandbox 5.0.7 and above, 4.4.10 and above; FortiSandbox PaaS 5.0.7 and above. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-107656 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-107656?: Check whether you run Fortinet FortiSandbox or Fortinet FortiSandbox PaaS at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

Fixed in: FortiSandbox 5.0.7 and above, 4.4.10 and above; FortiSandbox PaaS 5.0.7 and above

Technical details

The vulnerability is an authentication bypass using an alternate path or channel (CWE-288) in the FortiSandbox GUI that allows remote unauthenticated attackers to bypass authentication via crafted HTTP requests. An attacker can exploit this to execute unauthorized code or commands on affected FortiSandbox and FortiSandbox PaaS instances. The vulnerability affects multiple version branches across both the self-hosted and PaaS deployment models.

Affected products

Fortinet FortiSandbox 5.0.0 through 5.0.6, 4.4.0 through 4.4.9, 4.2 all versions
Fortinet FortiSandbox PaaS 5.0.0 through 5.0.6, 4.4 all versions, 4.2 all versions

Timeline

2026-10-13: disclosed
2026-10-26: advisory

References

https://fortiguard.fortinet.com/psirt/FG-IR-26-185

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