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.
Fix
Nothing published yet: no patch, vendor advisory or mitigation reference on NVD, no vendor advisory in the News for this CVE, not in CISA's KEV, no fixed package version. BaselineWatch does not guess at one.
Change history 1
- First seenCVSS 6.0 · opnsenseNVD modified 2026-10-30 11:31
Affected (CPE criteria) 0
NVD has not attached CPE configurations yet.
References 6
- https://github.com/opnsense/core/blob/26.7.8/src/etc/inc/plugins.inc.d/ntpd.inc#L285-L312 technical-description
- https://github.com/opnsense/core/blob/26.7.8/src/www/services_ntpd_gps.php#L49 technical-description
- https://github.com/opnsense/core/security/advisories/GHSA-fq94-cxvc-9r7w related, vendor-advisory
- https://abraxaslabs.tech/research/opnsense-ntp-gps-fudge third-party-advisory
- https://github.com/opnsense/core product
- https://www.vulncheck.com/advisories/opnsense-core-through-26.7.8-ntp-configuration-injection-via-gps-and-pps-fudge-fields third-party-advisory