CVE-2026-111217: Netgate pfSense CE through 2.9.0 OS Command Injection via CARP VHID
Netgate pfSense CE through 2.9.0 contains an OS command injection vulnerability that allows authenticated users with Virtual IP edit privileges to execute commands as root by storing an unvalidated CARP VHID. Attackers can supply a VHID containing shell metacharacters that executes via interfaceipaliasconfigure() ifconfig calls or getcarpinterfacestatus() when CARP status is rendered.
Affected Software
Event History
Frequently Asked Questions
Who can exploit this issue?
An authenticated pfSense CE user with Virtual IP edit privileges can exploit it. Exploitation does not require user interaction.
What attacker-controlled value is used for command execution?
The attacker supplies a CARP VHID containing shell metacharacters. The unvalidated value can be executed through interface_ipalias_configure() ifconfig calls or when CARP status is rendered by get_carp_interface_status().
What level of access can successful exploitation provide?
Successful exploitation allows commands to run as root. This can affect confidentiality, integrity, and availability.
Which versions are identified as affected?
The affected product is Netgate pfSense CE through version 2.9.0.