CVE-2026-26083

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 v3.1 Score

9.8

CRITICAL

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

EPSS — Exploit Prediction

0.0006

Probability of exploitation

0.20%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-862 Missing Authorization

Affected Products

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	All
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

Advisories & Patches

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

Frequently Asked Questions

What is 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 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. It has a CVSS v3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2026-26083? +

CVE-2026-26083 has a CVSS v3.1 score of 9.8 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately. The EPSS score is 0.0006, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-26083? +

CVE-2026-26083 affects products from fortinet, specifically: fortisandbox, fortisandbox_cloud, fortisandbox_paas. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-26083? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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