{"id":"CVE-2026-119423","published":"2026-10-30T12:16:39.210","lastModified":"2026-10-30T19:14:38.697","description":"OPNsense core before 26.7.8 contains a log injection vulnerability that allows unauthenticated attackers to plant victim IP addresses in the lockout_handler by submitting crafted WebGUI login usernames. Attackers can submit usernames like 'Invalid user <victim-ip>' repeatedly to add the victim to the sshlockout table, blocking SSH and WebGUI access and killing its pf states.","cvssScore":5.3,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","cwes":["CWE-117"],"vendors":[],"products":[],"references":[{"url":"https://abraxaslabs.tech/research/opnsense-lockout-factory-ip","tags":[]},{"url":"https://github.com/opnsense/core","tags":[]},{"url":"https://github.com/opnsense/core/blob/26.7.7/src/opnsense/mvc/app/library/OPNsense/Auth/AuthenticationFactory.php#L232","tags":[]},{"url":"https://github.com/opnsense/core/blob/26.7.7/src/opnsense/scripts/syslog/lockout_handler#L70","tags":[]},{"url":"https://github.com/opnsense/core/commit/14f8f7dd1d5f06522d60794a7beeac7adb9eca68","tags":[]},{"url":"https://github.com/opnsense/core/commit/2076f2c195bf9537ec220f0e5d6aff998f057410","tags":[]},{"url":"https://github.com/opnsense/core/security/advisories/GHSA-2v2x-m4j7-76pv","tags":[]},{"url":"https://www.vulncheck.com/advisories/opnsense-core-before-26.7.8-lockout-ip-planting-via-webgui-login-username","tags":[]}],"exploitRefs":[{"url":"https://github.com/opnsense/core","tags":[]},{"url":"https://github.com/opnsense/core/blob/26.7.7/src/opnsense/mvc/app/library/OPNsense/Auth/AuthenticationFactory.php#L232","tags":[]},{"url":"https://github.com/opnsense/core/blob/26.7.7/src/opnsense/scripts/syslog/lockout_handler#L70","tags":[]},{"url":"https://github.com/opnsense/core/commit/14f8f7dd1d5f06522d60794a7beeac7adb9eca68","tags":[]},{"url":"https://github.com/opnsense/core/commit/2076f2c195bf9537ec220f0e5d6aff998f057410","tags":[]},{"url":"https://github.com/opnsense/core/security/advisories/GHSA-2v2x-m4j7-76pv","tags":[]}],"hasPoc":true,"ai":null}