CVE-2026-44194 OPNsense: RCE on user managment
Authenticated users with management privileges can execute arbitrary root commands via crafted email inputs in the user synchronization script.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-44194?
CVE-2026-44194 is a critical command injection vulnerability in opnsense core, published on 13 May 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
OPNsense is a FreeBSD based firewall and routing platform. Prior to 26.1.8, an authenticated Remote Code Execution (RCE) vulnerability in the OPNsense core allows a user with user-management privileges to execute arbitrary system commands as root. An attacker can bypass input validation by formatting their malicious payload as a compliant email address, allowing shell commands to reach the underlying operating system. The flaw exists in the local user synchronization flow, within core/src/opnsense/scripts/auth/sync_user.php. This vulnerability is fixed in 26.1.8.
Weakness: CWE-78
Which versions are affected by CVE-2026-44194?
It affects 1 product.
Products include Opnsense Opnsense.
How do I fix CVE-2026-44194?
No fix has been published for CVE-2026-44194 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-2026-44194 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-44194 exists.
Other vulnerabilities in opnsense core
Sources
Also known as GHSA-f59w-m967-9rf6.