VIR Vulnerability Intelligence Relay

CVE-2026-44195

medium
Published 2026-05-13 · Modified 2026-05-15
CVSS v3
6.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
CVSS v2
—
VIR risk
6.5

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.

Predictions

Exploit likelihood
75%
Patch ETA
—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: security-advisories@github.com — https://github.com/opnsense/core/security/advisories/GHSA-h3vx-4q27-rc42

Application impact
VendorProductVersionsFixed
opnsenseopnsense{"endExcluding":"26.1.7"}26.1.7

References

CWEs

CWE-307

Verify integrity in audit chain (admin only). AS-IS.