CVE-2026-26248

Published Nov 10, 2026 CVSS 3.1 · 7.9 High EPSS < 1% KEV · Not listed

Description

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 Cloud 5.0.4 through 5.0.5, FortiSandbox PaaS 5.0.4 through 5.0.5 may allow an unauthenticated attacker to perform an XSS attack via social engineering and crafted HTTP requests.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Fortinet

FortiSandbox

unaffected

Version	Status	Constraints
`5.0.0`	affected	≤ 5.0.5
`4.4.0`	affected	≤ 4.4.8
`4.2.1`	affected	≤ 4.2.8

Fortinet

FortiSandbox Cloud

unaffected

Version	Status	Constraints
`5.0.4`	affected	≤ 5.0.5

Fortinet

FortiSandbox PaaS

unaffected

Version	Status	Constraints
`5.0.4`	affected	≤ 5.0.5

No data.

No data available yet.

Remediation

Vendor Solution

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 Cloud version 5.0.6 or above

Tracking

Advisories

No advisories available

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.551% probability within 30 days)

Key SSVC decision points have not yet been added.

References

Link	Providers
https://fortiguard.fortinet.com/psirt/FG-IR-26-142

History

Nov 12, 2026 8:15 PM Title updated View changes

Type	Values Removed	Values Added
Title	Cross‑Site Scripting Vulnerability in Fortinet FortiSandbox via Crafted HTTP Requests

Nov 12, 2026 2:30 AM Title updated View changes

Type	Values Removed	Values Added
Title		Cross‑Site Scripting Vulnerability in Fortinet FortiSandbox via Crafted HTTP Requests

Nov 11, 2026 4:00 AM Description updated View changes

Type	Values Removed	Values Added
Description	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 Cloud 5.0.4 through 5.0.5, FortiSandbox PaaS 5.0.4 through 5.0.5 may allow an unauthenticated attacker to perform an XSS attack via social engineering and crafted HTTP requests.	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 Cloud 5.0.4 through 5.0.5, FortiSandbox PaaS 5.0.4 through 5.0.5 may allow an unauthenticated attacker to perform an XSS attack via social engineering and crafted HTTP requests.

Nov 10, 2026 8:15 PM Description updated. First appearance in the feed. Weaknesses updated. Affected versions updated. Affected vendors updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Description		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 Cloud 5.0.4 through 5.0.5, FortiSandbox PaaS 5.0.4 through 5.0.5 may allow an unauthenticated attacker to perform an XSS attack via social engineering and crafted HTTP requests.
First Time appeared		Fortinet Fortinet fortisandbox Fortinet fortisandboxcloud Fortinet fortisandboxpaas
Weaknesses		CWE-79
CPEs		cpe:2.3:a:fortinet:fortisandbox:4.2.1:::::::* cpe:2.3:a:fortinet:fortisandbox:4.2.2:::::::* cpe:2.3:a:fortinet:fortisandbox:4.2.3:::::::* cpe:2.3:a:fortinet:fortisandbox:4.2.4:::::::* cpe:2.3:a:fortinet:fortisandbox:4.2.5:::::::* cpe:2.3:a:fortinet:fortisandbox:4.2.6:::::::* cpe:2.3:a:fortinet:fortisandbox:4.2.7:::::::* cpe:2.3:a:fortinet:fortisandbox:4.2.8:::::::* cpe:2.3:a:fortinet:fortisandbox:4.4.0:::::::* cpe:2.3:a:fortinet:fortisandbox:4.4.1:::::::* cpe:2.3:a:fortinet:fortisandbox:4.4.2:::::::* cpe:2.3:a:fortinet:fortisandbox:4.4.3:::::::* cpe:2.3:a:fortinet:fortisandbox:4.4.4:::::::* cpe:2.3:a:fortinet:fortisandbox:4.4.5:::::::* cpe:2.3:a:fortinet:fortisandbox:4.4.6:::::::* cpe:2.3:a:fortinet:fortisandbox:4.4.7:::::::* cpe:2.3:a:fortinet:fortisandbox:4.4.8:::::::* cpe:2.3:a:fortinet:fortisandbox:5.0.0:::::::* cpe:2.3:a:fortinet:fortisandbox:5.0.1:::::::* cpe:2.3:a:fortinet:fortisandbox:5.0.2:::::::* cpe:2.3:a:fortinet:fortisandbox:5.0.3:::::::* cpe:2.3:a:fortinet:fortisandbox:5.0.4:::::::* cpe:2.3:a:fortinet:fortisandbox:5.0.5:::::::* cpe:2.3:a:fortinet:fortisandboxcloud:5.0.4:::::::* cpe:2.3:a:fortinet:fortisandboxcloud:5.0.5:::::::* cpe:2.3:a:fortinet:fortisandboxpaas:5.0.4:::::::* cpe:2.3:a:fortinet:fortisandboxpaas:5.0.5:::::::*
Vendors & Products		Fortinet Fortinet fortisandbox Fortinet fortisandboxcloud Fortinet fortisandboxpaas
References		https://fortiguard.fortinet.com/psirt/FG-IR-26-142
Metrics		cvssV3_1 `{'score': 7.9, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C'}`