CVE-2026-126246 Null dereference in FortiAuthenticator
Unauthenticated attackers can crash FortiAuthenticator via crafted HTTP requests; Fortinet customers should update.
- 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-2026-126246?
CVE-2026-126246 is a high-severity null pointer dereference vulnerability in Fortinet FortiAuthenticator, 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 null pointer dereference vulnerability in Fortinet FortiAuthenticator 8.0.0 through 8.0.3, FortiAuthenticator 6.6.0 through 6.6.10 may allow an unauthenticated attacker to perform a denial of service attack via http requests.
Weakness: CWE-476
Which versions are affected by CVE-2026-126246?
An affected version is exposed as installed. No special setting or call is needed.
How do I fix CVE-2026-126246?
No fix has been published for CVE-2026-126246 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Check every result that can be empty before using it. More about Null pointer dereference.
Is CVE-2026-126246 being exploited?
There is no known exploitation of CVE-2026-126246 in the wild and no public exploit code.
Sources
Also known as GHSA-jg7g-j6rv-9xr9.