CVE-2026-111217 Netgate pfSense CE through 2.9.0 OS Command Injection via CARP VHID
Authenticated users with Virtual IP edit privileges can execute arbitrary commands as root via unvalidated CARP VHID input in pfSense CE.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-111217?
CVE-2026-111217 is a high-severity command injection vulnerability in Netgate pfSense CE, published on 15 Oct 2026. An attacker needs administrator access to exploit it, with no action from the victim.
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.
Weakness: CWE-78
Which versions are affected by CVE-2026-111217?
It affects 1 product.
Products include Pfsense Pfsense.
How do I fix CVE-2026-111217?
No fix has been published for CVE-2026-111217 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-111217 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-111217 exists.
Other vulnerabilities in Netgate pfSense CE
Sources
Also known as GHSA-fffm-6286-c3r5.