CVE-2026-126159 Missing authorization in FortiMail
Unauthenticated attackers can release or delete quarantined messages for arbitrary mailboxes in FortiMail via crafted quarantine requests.
- 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-2026-126159?
CVE-2026-126159 is a high-severity missing authorization 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 authorization bypass through user-controlled key vulnerability in Fortinet FortiMail 8.0.0 through 8.0.1, FortiMail 7.6.0 through 7.6.6, FortiMail 7.4.0 through 7.4.8, FortiMail 7.2 all versions may allow an unauthenticated attacker to release or delete quarantined messages for arbitrary mailboxes via a crafted quarantine release request.
Weakness: CWE-639
Which versions are affected by CVE-2026-126159?
An affected version is exposed as installed. No special setting or call is needed.
How do I fix CVE-2026-126159?
No fix has been published for CVE-2026-126159 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-126159 being exploited?
There is no known exploitation of CVE-2026-126159 in the wild and no public exploit code.
Sources
Also known as GHSA-289g-jgr3-r2rc.