Vulnerability in Opnsense Core
CVE-2026-119560
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.
Vulnerability class: CRLF Injection
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:L.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/opnsense/core/blob/26.7.8/src/etc/inc/plugins.inc.d/ntpd.inc (technical-description)
- github.com/opnsense/core/blob/26.7.8/src/www/services_ntpd_gps.php (technical-description)
- github.com/opnsense/core/security/advisories/GHSA-fq94-cxvc-9r7w (related, vendor-advisory)
- abraxaslabs.tech/research/opnsense-ntp-gps-fudge (third-party-advisory)
- github.com/opnsense/core (product)
- www.vulncheck.com/advisories/opnsense-core-through-26.7.8-ntp-configuration-inj… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-119560?
- CVE-2026-119560 is a medium-severity vulnerability in Opnsense Core, classified under CRLF Injection. CVSS score: 5.9/10. Published 2026-10-30.
- How severe is CVE-2026-119560?
- Medium severity. CVSS v3 base score is 5.9 out of 10.