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 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.

CVSS v3 9.1 CRITICAL

9.1^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 2.3 / Impact : 6.0

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

References

Link	Resource
https://github.com/opnsense/core/security/advisories/GHSA-f59w-m967-9rf6	Exploit Mitigation Vendor Advisory
https://github.com/opnsense/core/security/advisories/GHSA-f59w-m967-9rf6	Exploit Mitigation Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:opnsense:opnsense:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-05-13 22:16

Updated : 2026-06-17 10:50

NVD link : CVE-2026-44194

Mitre link : CVE-2026-44194

CVE.ORG link : CVE-2026-44194

JSON object : View

Products Affected

opnsense

opnsense

CWE

CWE-78

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

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