CVE-2026-111217
CVE-2026-111217 · Netgate pfSense CE through 2.9.0 OS Command Injection via CARP VHID
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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 interface_ipalias_configure() ifconfig calls or get_carp_interface_status() when CARP status is rendered.
CVSS 8.6 · High · EPSS 7.0%
- Published
- Updated
Affected products and versions
pfsense ce
- Versions
- ≥ 0, ≤ 2.9.0: Affected (semver)
No fix published
Original sources
- https://github.com/abraxas/pfsense-carp-vhid
- https://abraxaslabs.tech/research/pfsense-ce-leftovers
- https://abraxaslabs.tech/research/pfsense-carp-vhid
- https://github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/usr/local/pfSense/include/www/firewall_virtual_ip.inc#L200
- https://github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/etc/inc/interfaces.inc#L3236-L3238
- https://github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/etc/inc/pfsense-utils.inc#L794
- https://www.vulncheck.com/advisories/netgate-pfsense-ce-through-2.9.0-os-command-injection-via-carp-vhid
- https://nvd.nist.gov/vuln/detail/CVE-2026-111217