Netgate pfSense CE through 2.9.0 OS Command Injection via openvpn.connect_async.sh

Advisories

Netgate pfSense CE through 2.9.0 OS Command Injection via openvpn.connect_async.sh

Severity: high
Date: 10/15/2026
Affecting: pfSense CE <= 2.9.0
CVE: CVE-2026-111224
CWE: CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CVSS: 7.7
CVSS V4 Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
References: https://github.com/abraxas/pfsense-ovpn-connect-eval
https://abraxaslabs.tech/research/pfsense-ce-leftovers
https://github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/usr/local/sbin/openvpn.connect_async.sh#L83-L114
Credit: Abraxas Labs
Description: pfSense CE through 2.9.0 contains an OS command injection vulnerability in the OpenVPN openvpn.connect_async.sh script that allows authenticated VPN users to execute commands as root via crafted usernames. Attackers authenticated through RADIUS or LDAP can use usernames containing single quotes and shell metacharacters to break out of the eval'd pfctl anchor name on connect or disconnect.

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