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.
References
| Link | Resource |
|---|---|
| https://github.com/opnsense/core/security/advisories/GHSA-h3vx-4q27-rc42 | Exploit Mitigation Vendor Advisory |
| https://gist.github.com/sopex/b9786e72e2a5d9b1bbd81ed8477c351b | Exploit |
Configurations
History
15 May 2026, 16:06
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://github.com/opnsense/core/security/advisories/GHSA-h3vx-4q27-rc42 - Exploit, Mitigation, Vendor Advisory | |
| References | () https://gist.github.com/sopex/b9786e72e2a5d9b1bbd81ed8477c351b - Exploit | |
| First Time |
Opnsense
Opnsense opnsense |
|
| CPE | cpe:2.3:a:opnsense:opnsense:*:*:*:*:*:*:*:* |
14 May 2026, 15:16
| Type | Values Removed | Values Added |
|---|---|---|
| References |
|
13 May 2026, 22:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-05-13 22:16
Updated : 2026-05-15 16:06
NVD link : CVE-2026-44195
Mitre link : CVE-2026-44195
CVE.ORG link : CVE-2026-44195
JSON object : View
Products Affected
opnsense
- opnsense
CWE
CWE-307
Improper Restriction of Excessive Authentication Attempts