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    CVE-2026-48548

    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.

    Published:Aug 26, 2026
    Last Modified:Aug 26, 2026
    EPS:Aug 26, 2026
    EPSS Score:
    CVSS Score:6.5

    Affected Products

    Vendor
    Nagios
    Product
    Nagios Core

    Exploits

    No exploit reference

    Related CVEs

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    CVE-2026-48551 (CVSS 6.1) — Nagios Core before 4.5.14 and Nagios XI before 2026R1.7 contain a cross-site request forgery protection bypass…
    CVE-2026-48550 (CVSS 5.1) — Nagios Core before 4.5.14 and Nagios XI before 2026R1.7 are vulnerable to reflected cross-site scripting in cm…
    CVE-2020-35269 (CVSS 8.8) — Nagios Core application version 4.2.4 is vulnerable to Site-Wide Cross-Site Request Forgery (CSRF) in many fun…
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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High