CVE-2026-26084: 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
CVE-2026-26084 key facts
- CISA KEV
- Not listed (catalogue checked )
- Highest advisory rating
- Critical
- CVSS base score
- 9.9 (Fortinet), 9.9 (Fortinet)
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:H/E:P/RL:O/RC:C· base score 8.9, scored by fortinetAttack vector: network. Attack complexity: low. Privileges required: none. User interaction: none. Scope: changed. Confidentiality impact: low. Integrity impact: low. Availability impact: high.- Weakness
- CWE-284 Improper access control
- EPSS
- 0.39% chance of exploitation in the next 30 days (33rd percentile). FIRST EPSS, .
- CISA SSVC
- Exploitation: none observed. Automatable: yes. Technical impact: partial. CISA, .
- Vendor advisories
- 2 from Fortinet
- Assigned by
- fortinet (CNA)
- CVE record published
- Listed by VulniPulse
Ratings, versions and fixes are quoted from the vendor advisories that cover only CVE-2026-26084; each belongs to its advisory, not to every product listed. How records are collected and checked.
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 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.
Text from the CVE.org record (fortinet).
How do I fix CVE-2026-26084?
- Upgrade to FortiSandbox version 5.2.0 or above Upgrade to FortiSandbox version 5.0.6 or above Upgrade to FortiSandbox version 4.4.9 or above Upgrade to FortiSandbox PaaS version 5.2.0 or above Upgrade to FortiSandbox PaaS version 5.0.6 or above Upgrade to FortiSandbox PaaS version 4.4.9 or above Upgrade to FortiSandbox Cloud version 5.0.6 or above (CVE.org record)
Vendor advisories for CVE-2026-26084
Fortinet
2 advisories- Advisory severityCritical9.9
Critical [CVE-2026-26084] 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
CVE-2026-26084Source published Source 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 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.
- Affected products in this advisory
- FortiSandbox Cloud
- FortiSandbox PaaS
- Source-reported affected versions
- FortiSandbox FortiSandbox: 4.4 through 5.2 (vendor-listed versions)
- FortiSandbox Cloud FortiSandbox Cloud: 4.4 through 5.0 (vendor-listed versions)
- FortiSandbox PaaS FortiSandbox PaaS: 5.0 through 5.2 (vendor-listed versions)
- Source-reported fixed versions
- No fixed-version detail extracted. This does not mean no fix exists.
- Mitigation guidance
- No mitigation guidance extracted; consult the source.
- Advisory severityCritical9.9
Critical [CVE-2026-26084] Unauthenticated Control of NAT Rules Leading to Exposure of Sensitive Information
FG-IR-26-166Source published Source updated
CVSSv3 Score: 9.9 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. Revised on 2026-09-08 00:00:00
- Affected products in this advisory
- FortiSandbox Cloud
- FortiSandbox PaaS
- Source-reported affected versions
- FortiSandbox FortiSandbox: 4.4 through 5.2 (vendor-listed versions)
- FortiSandbox Cloud FortiSandbox Cloud: 4.4 through 5.0 (vendor-listed versions)
- FortiSandbox PaaS FortiSandbox PaaS: 5.0 through 5.2 (vendor-listed versions)
- Source-reported fixed versions
- No fixed-version detail extracted. This does not mean no fix exists.
- Mitigation guidance
- No mitigation guidance extracted; consult the source.
References
Timeline
- CVE record published
- First vendor advisory listed by VulniPulse
- CVE record last updated
More Fortinet advisories
CVE-2026-26248Nov 10, 2026FortiSandbox Cloud cross-site scripting (XSS)CVE-2026-25089Jun 9, 2026Second-Order OS Command Injection via JSON Input on start vnc featureCVE-2026-26083May 12, 2026Incorrect global authorizationCVE-2026-106172Oct 13, 2026Fabric API Authentication bypassCVE-2026-107656Oct 13, 2026FortiSandbox PaaS improper access controlCVE-2026-39808Apr 14, 2026OS Command Injection through API endpoint
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