CVE-2026-26083

Name: CVE-2026-26083
Creator: NVD / NIST
Published: 2026-05-12T18:16:39.817+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 0.73%

Last modified Jun 17, 2026

CVE-2026-26083 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. EPSS estimates a 0.73% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.73%

49.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-862

Affected Software

Vendor	Product	Versions
Fortinet	Fortisandbox	>= 4.4.0, < 4.4.9
Fortinet	Fortisandbox	>= 5.0.0, < 5.0.2
Fortinet	Fortisandbox Cloud	>= 5.0.2, < 5.0.6
Fortinet	Fortisandbox Cloud	>= 23.1.4245, <= 23.4.4374
Fortinet	Fortisandbox Cloud	24.1.4436
Fortinet	Fortisandbox Paas	>= 4.4.5, < 4.4.9
Fortinet	Fortisandbox Paas	>= 5.0.0, < 5.0.2
Fortinet	Fortisandbox Paas	>= 21.3.4055, <= 23.4.4374

References

https://fortiguard.fortinet.com/psirt/FG-IR-26-136Vendor Advisory

Timeline

Published: May 12, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-26083?

How severe is CVE-2026-26083?

CVE-2026-26083 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.73% probability of exploitation in the next 30 days.

How do I fix CVE-2026-26083?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-26083?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST