CVEsopnsenseCVE-2026-119560Published Oct 30, 11:31 · Updated Oct 30, 15:54 UTC
5.9
MediumCVSS 3.1 · from VulnCheck
CVE-2026-119560

OPNsense core through 26.7.8 NTP Configuration Injection via GPS and PPS Fudge Fields

core · CWE-93 · CWE-93
Affectedcore
FixNo fix listed yet.
PublishedOct 30, 11:31 · VulnCheck
ScoredOct 30 · 5.9 · VulnCheck
Exploit code publicNone known · checked 21:18 UTC
ExploitedNone known · CISA KEV checked 22:11 UTC

What we know

No known exploitation. CISA KEV, checked 22:11 UTC.
No public exploit code known. Exploit-DB, Metasploit, Nuclei, checked 21:18 UTC.
An attacker needs network access and an account. CVSS: network, low privileges.
It only works under certain conditions, which makes it harder to pull off. CVSS: high attack complexity.
A successful attack can change data. CVSS impact.

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.

From VulnCheck

Affected and fixed versions

ProductAffectedFixed incoreup to 26.7.8–

Exploit code

Exploit-DBnone knownMetasploitnone knownNucleinone known

References

github.com/opnsense/core/blob/26.7.8/src/etc/inc/plugins.inc.d/ntpd.inc#L285-L312 · github.comtechnical descriptiongithub.com/opnsense/core/blob/26.7.8/src/www/services_ntpd_gps.php#L49 · github.comtechnical descriptionGitHub Security Advisory (GHSA-fq94-cxvc-9r7w) · github.comrelatedvendor advisoryabraxaslabs.tech/research/opnsense-ntp-gps-fudge · abraxaslabs.techthird party advisorygithub.com/opnsense/core · github.comproductVulnCheck Advisory: OPNsense core through 26.7.8 NTP Configuration Injection via GPS and PPS Fudge Fields · vulncheck.comthird party advisory

Other CVEs in core

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5.4OPNsense 26.1.6 through 26.7.7 Captive Portal Session Takeover via Forged ARP · CVE-2026-119425Oct 306.8OPNsense before 26.7.8 Wireless WPA Configuration Line Injection via Identity · CVE-2026-119424Oct 305.3OPNsense core before 26.7.8 Lockout IP Planting via WebGUI Login Username · CVE-2026-119423Oct 30