Vulnerability in Netgate pfSense CE

[ Why it matters ]Priority signals

• Public proof-of-concept exploit exists (CISA SSVC)

[ Description ]Official description

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.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• BSI CERT-Bund15 Oct 2026WID-SEC-2026-3983

  Netgate pfSense: Multiple vulnerabilities Translated from German

  CVE-2026-111230CVE-2026-111225CVE-2026-111220+17 more CVEs

[ References ]References

• abraxaslabs.tech/research/pfsense-carp-vhidExploitIssue TrackingMitigation
• abraxaslabs.tech/research/pfsense-ce-leftoversIssue Tracking
• github.com/abraxas/pfsense-carp-vhidThird Party Advisory
• github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/etc/inc/in…Product
• github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/etc/inc/pf…Product
• github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/usr/local/…Product
• www.vulncheck.com/advisories/netgate-pfsense-ce-through-2.9.0-os-command-injection-via-…Third Party Advisory