Critical severity · published Sep 8, 2026
CVE-2026-26084
A improper access control vulnerability in Fortinet FortiSandbox 5.0.0 through 5.0.5, FortiSandbox 4.4.0 through 4.4.8, FortiSandbox Cloud 5.0.4 through 5.0.5, FortiSandbox PaaS…
9.9
CVSS
0.4%
EPSS
No
On KEV
Description
A improper access control vulnerability in Fortinet FortiSandbox 5.0.0 through 5.0.5, FortiSandbox 4.4.0 through 4.4.8, FortiSandbox Cloud 5.0.4 through 5.0.5, FortiSandbox PaaS 5.0.4 through 5.0.5 may allow attacker to access sensitive information via crafted HTTP requests.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 33% 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 5.0.5; 4.4.0 through 4.4.8; 4.2.1 through 4.2.8 · source: vendor
FC
FortiSandbox Cloud · Fortinet
5.0.4 through 5.0.5 · source: vendor
FP
FortiSandbox PaaS · Fortinet
5.0.4 through 5.0.5 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-26084
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-26084
fortiguard.fortinet.com
https://fortiguard.fortinet.com/psirt/FG-IR-26-166
More from FortiSandbox
9.8
CVE-2026-25089
Fortinet FortiSandbox OS Command Injection Vulnerability
9.8
CVE-2026-39808
Fortinet FortiSandbox OS Command Injection Vulnerability
9.8
CVE-2026-107656
An authentication bypass using an alternate path or channel vulnerability in Fortinet FortiSandbox 5.0.0 through 5.0.6, FortiSandbox 4.4.0 through 4.4.9, FortiSandbox 4.2 all…
9.8
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
CVE-2026-39813
A path traversal: '../filedir' vulnerability in Fortinet FortiSandbox 5.0.0 through 5.0.5, FortiSandbox 4.4.0 through 4.4.8 may allow attacker to escalation of privilege via…