CVE-2026-30868

Medium

Description

OPNsense is a FreeBSD based firewall and routing platform. Prior to 26.1.4, multiple OPNsense MVC API endpoints perform state‑changing operations but are accessible via HTTP GET requests without CSRF protection. The framework CSRF validation in ApiControllerBase only applies to POST/PUT/DELETE methods, allowing authenticated GET requests to bypass CSRF verification. As a result, a malicious website can trigger privileged backend actions when visited by an authenticated user, causing unintended service reloads and configuration changes through configd. This results in an authenticated Cross‑Site Request Forgery vulnerability allowing unauthorized system state changes. This vulnerability is fixed in 26.1.4.

SeverityMedium

CVSS6.3

Exploit probability—

ProductOpnsense

PublishedMar 11, 2026

First seenMar 11, 2026

Weakness typeCWE-352Cross-site request forgery (CSRF)

How to fix

Update

opnsense opnsense26.1.4 or later

Affected products

Product	Affected versions	Fixed in
opnsense opnsense	v < 26.1.4	26.1.4

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