How severe is CVE-2026-44194?

CVE-2026-44194 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-44194 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-44194?

CVE-2026-44194 affects Opnsense. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-44194?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2026-44194 have an EU (EUVD) identifier?

Yes. CVE-2026-44194 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30184.

When was CVE-2026-44194 published?

CVE-2026-44194 was published on 2026-05-13 and last updated on 2026-06-17.

CVE-2026-44194

CVE-2026-44194 is a critical-severity vulnerability in Opnsense with a CVSS 3.x base score of 9.1. 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-78.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
EPSS exploit prediction: 6% (93rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-30184
Weakness: CWE-78
Affected product: Opnsense
Published: 2026-05-13
Last modified: 2026-06-17

Description

OPNsense is a FreeBSD based firewall and routing platform. Prior to 26.1.8, an authenticated Remote Code Execution (RCE) vulnerability in the OPNsense core allows a user with user-management privileges to execute arbitrary system commands as root. An attacker can bypass input validation by formatting their malicious payload as a compliant email address, allowing shell commands to reach the underlying operating system. The flaw exists in the local user synchronization flow, within core/src/opnsense/scripts/auth/sync_user.php. This vulnerability is fixed in 26.1.8.

Frequently asked questions

What is CVE-2026-44194?: OPNsense is a FreeBSD based firewall and routing platform. Prior to 26.1.8, an authenticated Remote Code Execution (RCE) vulnerability in the OPNsense core allows a user with user-management privileges to execute arbitrary system commands as root. An attacker can bypass input validation by formatting their malicious payload as a compliant email address, allowing shell commands to reach the underlying operating system. The flaw exists in the local user synchronization flow, within core/src/opnsense/scripts/auth/sync_user.php. This vulnerability is fixed in 26.1.8.
How severe is CVE-2026-44194?: CVE-2026-44194 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-44194 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-44194?: CVE-2026-44194 affects Opnsense. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-44194?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-44194 have an EU (EUVD) identifier?: Yes. CVE-2026-44194 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30184.
When was CVE-2026-44194 published?: CVE-2026-44194 was published on 2026-05-13 and last updated on 2026-06-17.

References

https://github.com/opnsense/core/security/advisories/GHSA-f59w-m967-9rf6

Affected products (1)

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

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