CVE-2026-44194: 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…

PriorityP266critical9.1CVSS 3.1

AVNACLPRHUINSCCHIHAH

EPSS

6.35%

92.8th percentile

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.

Affected

2 ranges

Vendor	Product	Version range	Fixed in
opnsense	core	< 26.1.8	26.1.8
opnsense	opnsense	< 26.1.8	26.1.8

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