Description
Nagios Core before 4.5.13 and Nagios XI before 2026R1.5 contains a CSRF vulnerability in cmd.cgi. When no Cookie header is present, the double-submit cookie protection can be bypassed by supplying matching NagFormId and nagFormId values in the POST body, allowing a cross-site request to execute Nagios commands as a currently authenticated user.
Published: 2026-08-26
Score: 6.9 Medium
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Wed, 26 Aug 2026 16:00:00 +0000

Type Values Removed Values Added
Description Nagios Core before 4.5.13 and Nagios XI before 2026R1.5 contains a CSRF vulnerability in cmd.cgi. When no Cookie header is present, the double-submit cookie protection can be bypassed by supplying matching NagFormId and nagFormId values in the POST body, allowing a cross-site request to execute Nagios commands as a currently authenticated user.
Title Nagios Core / XI CSRF via cmd.cgi Double-Submit Cookie
First Time appeared Nagios
Nagios nagios Core
Nagios nagios Xi
Weaknesses CWE-352
CPEs cpe:2.3:a:nagios:nagios_core:*:*:*:*:*:*:*:*
cpe:2.3:a:nagios:nagios_xi:*:*:*:*:*:*:*:*
Vendors & Products Nagios
Nagios nagios Core
Nagios nagios Xi
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N'}

cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N'}

Subscriptions

Nagios Nagios Core Nagios Xi
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-08-26T15:37:20.083Z

Reserved: 2026-05-21T18:34:46.418Z

Link: CVE-2026-48549

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-08-26T16:16:26.967

Modified: 2026-08-26T16:16:26.967

Link: CVE-2026-48549

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses
  • CWE-352

    Cross-Site Request Forgery (CSRF)