How severe is CVE-2026-30868?

CVE-2026-30868 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is none, integrity high, and availability low.

Is CVE-2026-30868 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-30868?

CVE-2026-30868 affects Opnsense. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-30868?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-30868 have an EU (EUVD) identifier?

Yes. CVE-2026-30868 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-11238.

When was CVE-2026-30868 published?

CVE-2026-30868 was published on 2026-03-11 and last updated on 2026-06-17.

CVE-2026-30868

CVE-2026-30868 is a medium-severity vulnerability in Opnsense with a CVSS 3.x base score of 6.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-352.

Key facts

Severity: Medium (CVSS 3.x base score 6.3)
EPSS exploit prediction: 0% (4th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-11238
Weakness: CWE-352
Affected product: Opnsense
Published: 2026-03-11
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-30868?: 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.
How severe is CVE-2026-30868?: CVE-2026-30868 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is none, integrity high, and availability low.
Is CVE-2026-30868 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-30868?: CVE-2026-30868 affects Opnsense. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-30868?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-30868 have an EU (EUVD) identifier?: Yes. CVE-2026-30868 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-11238.
When was CVE-2026-30868 published?: CVE-2026-30868 was published on 2026-03-11 and last updated on 2026-06-17.

References

https://github.com/opnsense/core/security/advisories/GHSA-pp58-2qpc-3j3f

Affected products (1)

cpe:2.3:a:opnsense:opnsense:*:*:*:*:*:*:*:*

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