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CVE-2026-26083

Fortinet Fortisandbox Paas broken access control

9.8 CRITICALEPSS 0.50%
  1. Published12 May 2026

Description

A missing authorization vulnerability in Fortinet FortiSandbox 5.0.0 through 5.0.1, FortiSandbox 4.4.0 through 4.4.8, FortiSandbox Cloud 5.0.2 through 5.0.5, FortiSandbox PaaS 23.4 all versions, FortiSandbox PaaS 23.3 all versions, FortiSandbox PaaS 23.1 all versions, FortiSandbox PaaS 22.2 all versions, FortiSandbox PaaS 22.1 all versions, FortiSandbox PaaS 21.4 all versions, FortiSandbox PaaS 21.3 all versions, FortiSandbox PaaS 5.0.0 through 5.0.1, FortiSandbox PaaS 4.4.5 through 4.4.8 may allow an unauthenticated attacker to execute unauthorized code or commands via HTTP requests.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Fortinet Fortisandbox≥ 4.4.0 < 4.4.9 · ≥ 5.0.0 < 5.0.2
Fortinet Fortisandbox Cloud≥ 23.1.4245 ≤ 23.4.4374 · ≥ 5.0.2 < 5.0.6 · 24.1.4436
Fortinet Fortisandbox Paas≥ 21.3.4055 ≤ 23.4.4374 · ≥ 4.4.5 < 4.4.9 · ≥ 5.0.0 < 5.0.2

Remediation

Fixed in
Fortinet Fortisandbox≥ 4.4.9
Fortinet Fortisandbox Cloud≥ 5.0.6
Fortinet Fortisandbox Paas≥ 4.4.9

References

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Frequently asked

Is CVE-2026-26083 being actively exploited?

CVE-2026-26083 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.50%.

How severe is CVE-2026-26083?

CVE-2026-26083 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 0.50% probability of exploitation.

Which products are affected by CVE-2026-26083?

Affected products include Fortinet Fortisandbox, Fortinet Fortisandbox Cloud, Fortinet Fortisandbox Paas.

How do I fix CVE-2026-26083?

Upgrade affected software to a fixed version, for example Fortinet Fortisandbox 4.4.9, Fortinet Fortisandbox Cloud 5.0.6, Fortinet Fortisandbox Paas 4.4.9 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-26083 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.