CVE-2026-39812

A improper neutralization of input during web page generation ('cross-site scripting') 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 PaaS 5.0.0 through 5.0.5, FortiSandbox PaaS 4.4.0 through 4.4.8, FortiSandbox PaaS 4.2 all versions may allow attacker to execute unauthorized code or commands via <insert attack vector here>

Published: 2026-04-14 Last update: 2026-04-21 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2026-39812 is rated Low Risk (22/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.03%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2026-39812

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-04-15 — 0.03% —

Full EPSS history (1 record total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-39812

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.8 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:H)
They need powerful rights—admin, root, or similar—before this pays off.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N)
Service keeps running; no real outage angle.
 1.7 2.7 [email protected]

Weakness enumeration for CVE-2026-39812

Affected software / configurations for CVE-2026-39812

Vendor Product Version Raw CPE
fortinet fortisandbox >= 4.2.0, <= 4.2.8 cpe:2.3:a:fortinet:fortisandbox:*:*:*:*:*:*:*:*
fortinet fortisandbox >= 4.4.0, < 4.4.9 cpe:2.3:a:fortinet:fortisandbox:*:*:*:*:*:*:*:*
fortinet fortisandbox >= 5.0.0, < 5.0.6 cpe:2.3:a:fortinet:fortisandbox:*:*:*:*:*:*:*:*
fortinet fortisandbox_cloud >= 22.2.4134, <= 23.1.4260 cpe:2.3:a:fortinet:fortisandbox_cloud:*:*:*:*:*:*:*:*
fortinet fortisandbox_cloud >= 23.3.4329, <= 24.1.4436 cpe:2.3:a:fortinet:fortisandbox_cloud:*:*:*:*:*:*:*:*
fortinet fortisandbox_cloud 5.0.4 cpe:2.3:a:fortinet:fortisandbox_cloud:5.0.4:*:*:*:*:*:*:*
fortinet fortisandbox_cloud 5.0.5 cpe:2.3:a:fortinet:fortisandbox_cloud:5.0.5:*:*:*:*:*:*:*

References for CVE-2026-39812

cvelogic Threat Intelligence