CVE-2026-113779 pfSense REST API package Vulnerable to Privilege Escalation via Scoped HA Settings Sync Permission
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-113779?
CVE-2026-113779 is a high-severity vulnerability in pfrest pfSense-pkg-RESTAPI, published on 21 Oct 2026.
Official description
The pfSense REST API package is an unofficial, open-source REST and GraphQL API for pfSense CE and pfSense Plus firewalls. A privilege escalation vulnerability in pfSense-pkg-RESTAPI prior to version 2.9.0 allows authenticated accounts holding the dedicated settings sync permission to modify REST API configuration secrets. This enables a non-administrative user to elevate their privileges to a full administrator. pfSense-pkg-RESTAPI 2.9.0 patches the issue. Access to the HA settings sync endpoint now strictly requires full administrative privileges (`page-all`). The sub-administrative sync privilege has been removed in versions v2.9.0 and later. In addition to correcting the access control boundary, version 2.9.0 includes the following hardening measures: opt-in default and format and validation modernization. As a workaround, one may mitigate exposure by taking either or all of the following steps. Revoke Scoped Permissions: Remove the `api-v2-system-restapi-settings-sync-post` privilege from all non-administrative users. Apply ACLs: Configure REST API Access Control Lists (ACLs) and/or firewall rules to restrict access to API endpoints exclusively to trusted administrator and HA peer IP addresses.
Weakness: CWE-502
Which versions are affected by CVE-2026-113779?
How do I fix CVE-2026-113779?
No fix has been published for CVE-2026-113779 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-113779 being exploited?
There is no known exploitation of CVE-2026-113779 in the wild and no public exploit code.
Sources
Also known as GHSA-8q8g-9f77-8g8g.