Critical9.1Fortinet

Critical [CVE-2026-26083] Incorrect global authorization

This critical-severity Fortinet advisory covers CVE-2026-26083 affecting FortiSandbox.

FG-IR-26-136 Published May 12, 2026Updated by vendor May 12, 2026

CVE-2026-26083

Affected products & platforms

FortinetFortiSandbox

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Summary

CVSSv3 Score:

9.1

A missing authorization vulnerability [CWE-862] in FortiSandbox, FortiSandbox Cloud and FortiSandbox PaaS WEB UI may allow an unauthenticated attacker to execute unauthorized code or commands via HTTP requests.

Revised on 2026-05-12 00:00:00

Affected versions

FortiSandbox 5.0: 5.0.0 through 5.0.1
FortiSandbox 4.4: 4.4.0 through 4.4.8
FortiSandbox Cloud 5.0: 5.0.2 through 5.0.5
FortiSandbox PaaS 23.4: 23.4 all versions
FortiSandbox PaaS 23.3: 23.3 all versions
FortiSandbox PaaS 23.1: 23.1 all versions
FortiSandbox PaaS 22.2: 22.2 all versions
FortiSandbox PaaS 22.1: 22.1 all versions
FortiSandbox PaaS 21.4: 21.4 all versions
FortiSandbox PaaS 21.3: 21.3 all versions
FortiSandbox PaaS 5.0: 5.0.0 through 5.0.1
FortiSandbox PaaS 4.4: 4.4.5 through 4.4.8

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Fixed versions

FortiSandbox 5.0: 5.0.2
FortiSandbox 4.4: 4.4.9
FortiSandbox Cloud 24: migrate to a fixed release
FortiSandbox Cloud 23: migrate to a fixed release
FortiSandbox Cloud 5.0: 5.0.6
FortiSandbox PaaS 23.4: migrate to a fixed release
FortiSandbox PaaS 23.3: migrate to a fixed release
FortiSandbox PaaS 23.1: migrate to a fixed release
FortiSandbox PaaS 22.2: migrate to a fixed release
FortiSandbox PaaS 22.1: migrate to a fixed release
FortiSandbox PaaS 21.4: migrate to a fixed release
FortiSandbox PaaS 21.3: migrate to a fixed release
FortiSandbox PaaS 5.0: 5.0.2
FortiSandbox PaaS 4.4: 4.4.9

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Mitigation checklist

Recommended fix / mitigation

Upgrade per the Affected/Solution table: FortiSandbox 5.0: 5.0.2; FortiSandbox 4.4: 4.4.9; FortiSandbox Cloud 24: migrate to a fixed release; FortiSandbox Cloud 23: migrate to a fixed release; FortiSandbox Cloud 5.0: 5.0.6; ….

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Sources

Official and corroborating records used to build this advisory.

FortiGuard PSIRT Advisoriesofficial
Official vendor feed — the source of truth for this advisory. VulnPulse polled this feed and parsed this entry from it. Discovered from the machine-readable feed https://filestore.fortinet.com/fortiguard/rss/ir.xml; this link opens the Fortinet advisory index instead of the raw feed document.
Fortinet
Vendor advisory pageofficial
Advisory page fetched and parsed to extract affected/fixed versions and mitigation guidance beyond what the feed carries.
Fortinet

Cross-references

Validate CVE metadata against the authoritative registries.

CVE-2026-26083NVD CVE.org MITRE

Official resources

FortiSandbox documentation & upgrade guides
Official documentation
This advisory names 5.0 / 4.4 / 24 as the first fixed releases — official upgrade documentation for FortiSandbox.

Discussion(0)

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