CVE-2026-44195

Name: CVE-2026-44195
Creator: NVD / NIST
Published: 2026-05-13T22:16:43.82+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.32%

Last modified Jun 17, 2026

CVE-2026-44195 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. OPNsense is a FreeBSD based firewall and routing platform. Prior to 26.1.7, a logic flaw in the OPNsense lockout_handler allows an unauthenticated attacker to continuously reset the authentication failure counter for their IP address. EPSS estimates a 0.32% chance of exploitation in the next 30 days.

Description

OPNsense is a FreeBSD based firewall and routing platform. Prior to 26.1.7, a logic flaw in the OPNsense lockout_handler allows an unauthenticated attacker to continuously reset the authentication failure counter for their IP address. By interjecting a crafted username containing a success keyword ("Accepted" or "Successful login") between normal brute-force attempts, an attacker can prevent the failure counter from ever reaching the lockout threshold. This vulnerability is fixed in 26.1.7.

Metrics

CVSS 3.1

6.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

EPSS Probability

0.32%

23.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-307

Affected Software

Vendor	Product	Versions
Opnsense	Opnsense	< 26.1.7

References

https://github.com/opnsense/core/security/advisories/GHSA-h3vx-4q27-rc42Exploit, Mitigation, Vendor Advisory
https://gist.github.com/sopex/b9786e72e2a5d9b1bbd81ed8477c351bExploit

Timeline

Published: May 13, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-44195?

How severe is CVE-2026-44195?

CVE-2026-44195 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.32% probability of exploitation in the next 30 days.

How do I fix CVE-2026-44195?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-44195?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST