CVE-2026-119560

Description

OPNsense core through 26.7.8 contains a configuration injection vulnerability that allows authenticated users to append ntpd.conf directives by embedding newlines in the fudge and refid fields. Attackers holding the page-services-ntp-gps or PPS privilege can submit CR/LF characters via services_ntpd_gps.php or services_ntpd_pps.php to inject directives loaded by ntpd running as root.

References

• https://abraxaslabs.tech/research/opnsense-ntp-gps-fudge
• https://github.com/opnsense/core
• https://github.com/opnsense/core/blob/26.7.8/src/etc/inc/plugins.inc.d/ntpd.inc#L285-L312
• https://github.com/opnsense/core/blob/26.7.8/src/www/services_ntpd_gps.php#L49
• https://github.com/opnsense/core/security/advisories/GHSA-fq94-cxvc-9r7w