CVE-2026-39812

unknowncovered by 1 sourcefirst seen 2026-04-14

CVSSv3 Score: 4.3 An Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability [CWE-79] in FortiSandbox and FortiSandbox Cloud may allow a privileged attacker to perform a stored XSS attack via crafted HTTP requests. Revised on 2026-04-14 00:00:00

CSIRTS triage

What: A stored XSS vulnerability allows a privileged attacker to perform attacks via crafted HTTP requests.
Who is affected: Privileged users of FortiSandbox and FortiSandbox Cloud.
Urgency: Remediation is necessary due to the potential for exploitation, although it is not currently being exploited.
Action: Update to the latest version to mitigate the vulnerability.

AI-assisted analysis generated from the source advisory — verify against the original.

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Exploitation outlook

Low exploitation risk0.19% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 9% of all EPSS-scored CVEs.

Advisory coverage (1)

unknownMultiple Stored XSSfortinet · 2026-04-14

External references

NVD record for CVE-2026-39812

CVE.org record

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