CVE 9.1 CRITICAL

OPNsense: RCE on user managment_CVE-2026-44194

May 13, 2026 invoker category_cve

9.1 / 10

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

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.

AI Analysis

Authenticated Remote Code Execution (RCE) vulnerability in OPNsense core

Basic Information

ID CVE-2026-44194

Source GitHub_M

Published May 13, 2026 at 21:53

Affected Product

Vendor opnsense

Product core

Version < 26.1.8

Affected Versions opnsense core < 26.1.8

CWE Classification

CWE-78

AI Assessment

AI Score 9.1 / 10

AI Severity Critical

Vendor Deciso

Product OPNsense

Version < 26.1.8

References

github.com /opnsense/core/security/advisories/GHSA-f59w-m967-9rf6

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