Critical severity · published May 12, 2026
CVE-2026-26083
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…
9.8
CVSS
0.7%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 54% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FO
FortiSandbox · Fortinet
5.0.0 through 5.0.1; 4.4.0 through 4.4.8; 4.2.1 through 4.2.8 · source: vendor, NVD
FC
FortiSandbox Cloud · Fortinet
5.0.0 through 5.0.1; 4.4.5 through 4.4.8 · source: vendor, NVD
FP
FortiSandbox PaaS · Fortinet
23.4.4374; 23.4.4350; 23.3.4329; 23.1.4245; 22.2.4151; 22.2.4134; +5 more · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-26083
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-26083
Vendor Advisory
https://fortiguard.fortinet.com/psirt/FG-IR-26-136
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