medium5.3
CVE-2026-44195
OPNsense is a FreeBSD based firewall and routing platform.
Impact
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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Opnsense | Opnsense | before 26.1.7 |