CVE-2026-26084: Unauthenticated Control of NAT Rules Leading to Exposure of Sensitive Information

Published Sep 8, 2026
·
Updated

A improper access control vulnerability in Fortinet FortiSandbox 5.0.0 through 5.0.5, FortiSandbox 4.4.0 through 4.4.8, FortiSandbox 4.2 all versions, 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.

Other sources

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.

— NVD

An improper access control vulnerability [CWE-284] in FortiSandbox, FortiSandbox Cloud and FortiSandbox PaaS WEB UI may allow an unauthenticated attacker to access sensitive information via crafted HTTP requests.

— FortiGuard

Affected Software

8 affected componentsFixes available
Fortinet FortiSandbox>=5.0.0<=5.0.5
Fortinet FortiSandbox>=4.4.0<=4.4.8
Fortinet FortiSandbox Cloud>=5.0.4<=5.0.5
Fortinet FortiSandbox PaaS>=5.0.4<=5.0.5
Fortinet FortiSandbox>=5.0.0<=5.0.5
Fortinet FortiSandbox>=4.4.0<=4.4.8
Fortinet FortiSandbox Cloud>=5.0.4<=5.0.5
Fortinet FortiSandbox PaaS>=5.0.4<=5.0.5

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade Fortinet FortiSandbox Cloud to a version that resolves this vulnerability.

    Fixed in 5.0.6
  2. Upgrade

    Upgrade Fortinet FortiSandbox PaaS to a version that resolves this vulnerability.

    Fixed in 4.4.9
  3. Upgrade

    Upgrade Fortinet FortiSandbox PaaS to a version that resolves this vulnerability.

    Fixed in 5.0.6
  4. Upgrade

    Upgrade Fortinet FortiSandbox PaaS to a version that resolves this vulnerability.

    Fixed in 5.2.0
  5. Upgrade

    Upgrade Fortinet FortiSandbox to a version that resolves this vulnerability.

    Fixed in 4.4.9
  6. Upgrade

    Upgrade Fortinet FortiSandbox to a version that resolves this vulnerability.

    Fixed in 5.0.6
  7. Upgrade

    Upgrade Fortinet FortiSandbox to a version that resolves this vulnerability.

    Fixed in 5.2.0

Event History

Sep 8, 2026
Advisory Published
via FortiGuard·12:00 AM
Data Sourced
via FortiGuard·12:00 AM
DescriptionSeverityWeaknessAffected Software
CVE Published
via MITRE·04:41 PM
Data Sourced
via MITRE·04:41 PM
RemedyDescriptionSeverityWeakness
Data Sourced
via NVD·05:17 PM
DescriptionSeverityWeakness

Frequently Asked Questions

1

Which deployments are affected?

Affected versions are 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, and FortiSandbox PaaS 5.0.4 through 5.0.5.

2

Does exploitation require authentication or user interaction?

No. The supplied vector indicates network-based exploitation with low attack complexity, no privileges required, and no user interaction required.

3

What can an attacker do if exploitation succeeds?

An attacker may access sensitive information by sending crafted HTTP requests. The supplied severity vector also indicates low confidentiality and integrity impact and high availability impact, with scope changed.

Company

Resources

Contact

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