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Fortinet FortiManager JSON Injection in JRPC API (FG-IR-26-219)

critical Nessus Plugin ID 378667

Synopsis

Fortinet Firewall is missing one or more security-related updates.

Description

The version of FortiManager installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the FG-IR-26-219 advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

For 7.6.x, upgrade to FortiManager version 7.6.8 or later. For 8.0.x, upgrade to FortiManager version 8.0.3 or later.

See Also

https://www.fortiguard.com/psirt/FG-IR-26-219

Plugin Details

Severity: Critical

ID: 378667

File Name: fortimanager_FG-IR-26-219.nasl

Version: 1.1

Type: Local

Family: Firewalls

Published: 11/11/2026

Updated: 11/11/2026

Configuration: Enable paranoid mode

Supported Sensors: Nessus

Risk Information

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2026-126170

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:fortinet:fortimanager

Required KB Items: Settings/ParanoidReport, Host/Fortigate/model, Host/Fortigate/version

Exploit Ease: No known exploits are available

Patch Publication Date: 11/10/2026

Vulnerability Publication Date: 11/10/2026

Reference Information

CVE: CVE-2026-126170