Nagios Core CSRF in cmd.cgi before 4.5.12 allows Auth Command Exec
CVE-2026-48548 Published on August 26, 2026
Nagios Core CSRF via cmd.cgi
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.
Vulnerability Analysis
CVE-2026-48548 is exploitable with network access. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity and availability.
Weakness Type
What is a Session Riding Vulnerability?
The web application does not, or can not, sufficiently verify whether a well-formed, valid, consistent request was intentionally provided by the user who submitted the request. When a web server is designed to receive a request from a client without any mechanism for verifying that it was intentionally sent, then it might be possible for an attacker to trick a client into making an unintentional request to the web server which will be treated as an authentic request. This can be done via a URL, image load, XMLHttpRequest, etc. and can result in exposure of data or unintended code execution.
CVE-2026-48548 has been classified to as a Session Riding vulnerability or weakness.
Products Associated with CVE-2026-48548
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Affected Versions
Nagios Enterprises, LLC. Nagios Core:- Before 4.5.12 is affected.