CVE-2026-84389 Open redirect in FortiSIEM
An open redirect vulnerability in FortiSIEM allows attackers to redirect users to untrusted sites, potentially facilitating phishing or further attacks.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-84389?
CVE-2026-84389 is a low-severity vulnerability in Fortinet FortiSIEM, published on 8 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
A url redirection to untrusted site ('open redirect') vulnerability in Fortinet FortiSIEM 7.5.0 through 7.5.1, FortiSIEM 7.4.1 through 7.4.2 may allow attacker to execute unauthorized code or commands via <insert attack vector here>
Weakness: CWE-601
Which versions are affected by CVE-2026-84389?
How do I fix CVE-2026-84389?
No fix has been published for CVE-2026-84389 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-84389 being exploited?
There is no known exploitation of CVE-2026-84389 in the wild and no public exploit code.
Sources
Also known as GHSA-3fm5-pxmf-24vc.