CVE-2026-44195

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.

CVSS v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

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

Configuration 1 (hide)

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

History

No history.

Information

Published : 2026-05-13 22:16

Updated : 2026-06-17 10:50

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

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