CVE-2026-119560
OPNsense core through 26.7.8 NTP Configuration Injection via GPS and PPS Fudge Fields
- State
- Published
- Severity
- 6.0 Medium
- Published
- Oct 30, 2026
- Updated
- Oct 30, 2026
- Reserved
- Oct 30, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.0 Medium | CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 5.9 Medium | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:L | VulnCheck |
Weaknesses
- CWE-93 Improper Neutralization of CRLF Sequences ('CRLF Injection')
Affected Products
| Product | Versions |
|---|---|
coreopnsense |
|
References
- https://github.com/opnsense/core/blob/26.7.8/src/etc/inc/plugins.inc.d/ntpd.inc#L285-L312technical-description
- https://github.com/opnsense/core/blob/26.7.8/src/www/services_ntpd_gps.php#L49technical-description
- GitHub Security Advisory (GHSA-fq94-cxvc-9r7w)relatedvendor-advisory
- https://abraxaslabs.tech/research/opnsense-ntp-gps-fudgethird-party-advisory
- https://github.com/opnsense/coreproduct
- VulnCheck Advisory: OPNsense core through 26.7.8 NTP Configuration Injection via GPS and PPS Fudge Fieldsthird-party-advisory
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