Fortinet FortiMail 8.0.0: command injection

Fortinet FortiMail

A improper neutralization of special elements used in an os command ('os command injection') vulnerability in Fortinet FortiMail 8.0.0 through 8.0.1, FortiMail 7.6.0 through 7.6.6 may allow an unauthenticated attacker to execute unauthorized code or commands via crafted HA join-request packets.

Do this now

Upgrade FortiMail to 8.0.2 or 7.6.7 to close the HA join-request command injection.

Who should check: teams running VPN & firewalls

Fix it

FortiMail

On 7.xUpgrade to FortiMail 7.6.7
On 8.xUpgrade to FortiMail 8.0.2

FortiMail Cloud: no customer action required (FG-IR-26-200) (vendor advisory)

First seen: 12 Nov 2026
Last update: 12 Nov 2026, 04:18 UTC
Fixed in: 8.0.2
7.6.7
Identifiers: CVE-2026-126148
CVSS: 9.8
Source: news
On the menu as: VPN & firewalls

Check this repository for exposure to one security incident from pwned.coffee. Report first, change nothing until I say so.

## Fortinet FortiMail 8.0.0: command injection
Severity: critical. Patch status: patched.
Affected: Fortinet FortiMail
Fixed in: 8.0.2, 7.6.7
Ids: CVE-2026-126148

A improper neutralization of special elements used in an os command ('os command injection') vulnerability in Fortinet FortiMail 8.0.0 through 8.0.1, FortiMail 7.6.0 through 7.6.6 may allow an unauthenticated attacker to execute unauthorized code or commands via crafted HA join-request packets.

## Steps
1. This touches infrastructure (vpn-edge). Look in terraform, ansible, cloud-init, Dockerfiles and docs for the product and version we run. If it isn't in the repo, say so and list what a human should check on the box.
2. Fix by release line: FortiMail: 8.0.x → 8.0.2; 7.6.x → 7.6.7.

## Fix by release line
| Line | State | Fix | Until then |
|---|---|---|---|
| FortiMail 8.0.x | fixed | 8.0.2 | — |
| FortiMail 7.6.x | fixed | 7.6.7 | — |

## Report
A table: file, product or package, version in use, affected yes/no, exact fix. Then anything a human has to check outside the repo.

If you have the pwned.coffee MCP server (https://pwned.coffee/mcp), call lookup_cve("CVE-2026-126148") for the latest, and check_repo with this repo's lockfiles, Dockerfiles and workflows for a full receipt.
Sources: https://fortiguard.fortinet.com/psirt/FG-IR-26-200 https://nvd.nist.gov/vuln/detail/CVE-2026-126148
https://pwned.coffee/i/fortinet-fortimail-8-0-0-command-injection-cve-2026-126148

Timeline

12 Nov 2026, 04:18 UTC
Fix status: unknown → patched.
12 Nov 2026
First reported.

Receipt

Exploitation: No known exploitation
Fix by release line: Product Affected Fixed in Source
FortiMail <= 8.0.1 8.0.2 Vendor advisory checked 12 Nov
FortiMail <= 7.6.6 7.6.7 Vendor advisory checked 12 Nov
Score: CVSS 9.8 (critical). CVSS 3.1 9.8 (CNA fortinet) for CVE-2026-126148
Last checked: 13 Nov 2026, 16:26 UTC

Product	Affected	Fixed in	Source
FortiMail	<= 8.0.1	8.0.2	Vendor advisory checked 12 Nov
FortiMail	<= 7.6.6	7.6.7	Vendor advisory checked 12 Nov

Sources: KEV – CVE record ✓ Vendor ✓

Sources

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