Medium 6.5Published Aug 26, 2026

CVE-2026-48548Nagios Core CSRF via cmd.cgi

Updated under an hour ago (2026-10-19 11:20 UTC)

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It affects Nagios Enterprises, LLC. Nagios Core. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Nagios Enterprises, LLC. Nagios Core

Exploited in the last 30 days

Nagios Core before 4.5.12 contains a cross-site request forgery vulnerability in cmd.cgi where the CSRF protection mechanism passes validation when the NagFormId cookie is absent. Attackers can craft a malicious cross-site POST request to execute arbitrary Nagios commands as a currently authenticated user without their knowledge or consent.

CVSS: 6.5 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Weakness (CWE): CWE-352
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Deferred
Record last updated: Aug 26, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Nagios Enterprises, LLC. Nagios Core nagios_enterprises:nagios_core (from the name)	before 4.5.12	CNA record

References

https://www.nagios.com/security-disclosures/nagios-core/vendor-advisory, patch
https://github.com/NagiosEnterprises/nagioscore/blob/master/Changelogrelease-notes
https://www.vulncheck.com/advisories/nagios-core-csrf-via-cmd-cgithird-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.