Medium severity6.5NVD Advisory· Published Aug 26, 2026

CVE-2026-48549

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Nagios/Nagiosreferences2 versions
(expand)+ 1 more
- (no CPE)
- (no CPE)range: <2026R1.5
Nagios/nagioscorellm-fuzzy
Range: <4.5.13

Patches

Vulnerability mechanics

References

github.com/NagiosEnterprises/nagioscore/blob/master/Changelognvd
www.nagios.com/security-disclosures/nagios-core/nvd
www.vulncheck.com/advisories/nagios-core-xi-csrf-via-cmd-cgi-double-submit-cookienvd

News mentions

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cvss	0.423
epss	0.000
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000