CVE-2026-48548

MEDIUM 6.5

Nagios Core CSRF via cmd.cgi

CVSS Score

6.5

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-352
Vendor	nagios enterprises, llc.
Product	nagios core
Published	Aug 26, 2026
Last Updated	Aug 26, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

Affected Versions

Nagios Enterprises, LLC. / Nagios Core

0 < 4.5.12

References

NVD ↗ CVE.org ↗ EPSS Data ↗

nagios.com: https://www.nagios.com/security-disclosures/nagios-core/ github.com: https://github.com/NagiosEnterprises/nagioscore/blob/master/Changelog vulncheck.com: https://www.vulncheck.com/advisories/nagios-core-csrf-via-cmd-cgi

Credits

SeungMyung Lee