CVE-2026-126148 Command injection in FortiMail
Unauthenticated attackers can execute commands on FortiMail via crafted HA join-request packets; FortiMail administrators should care.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Harmful if only installed
- No
- Needs a specific call
- No
- Fix
- None listed
What is CVE-2026-126148?
CVE-2026-126148 is a critical command injection vulnerability in Fortinet FortiMail, published on 11 Nov 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-78
Which versions are affected by CVE-2026-126148?
Only installations with a non-default setting turned on are exposed.
How do I fix CVE-2026-126148?
No fix has been published for CVE-2026-126148 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-126148 being exploited?
There is no known exploitation of CVE-2026-126148 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-94pv-xwr4-33w5.