CVE-2026-48549

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Source
https://cve.org/CVERecord?id=CVE-2026-48549
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-48549.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-48549
Downstream
Published
2026-08-26T15:37:20Z
Modified
2026-08-30T03:30:27Z
Severity
  • 6.9 (Medium) CVSS_V4 - 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 CVSS Calculator
Summary
Nagios Core / XI CSRF via cmd.cgi Double-Submit Cookie
Details

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.

Database specific 
{
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
        "CWE-352"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48549.json",
    "unresolved_ranges": [
        {
            "extracted_events": [
                {
                    "fixed": "2026R1.5"
                }
            ],
            "source": "AFFECTED_FIELD"
        }
    ]
}
References

Affected packages

Git / github.com/nagiosenterprises/nagioscore

Affected ranges

Type
GIT
Repo
https://github.com/nagiosenterprises/nagioscore
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
367ec800bfbecf1ca1e857fe73bdb5fba5cc9003
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "4.5.13"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "DESCRIPTION"
    ]
}

Affected versions

4.*
4.2.1
nagios-1.*
nagios-1.0a6
nagios-1.0a7
nagios-1.0b1
nagios-1.0b2
nagios-1.0b3
nagios-1.0b4
nagios-1.0b5
nagios-1.0b6
nagios-2.*
nagios-2.0
nagios-2.0.b5
nagios-2.0b1
nagios-2.0b2
nagios-2.0b3
nagios-2.0b4
nagios-2.0b6
nagios-2.0rc1
nagios-3.*
nagios-3.0
nagios-3.0.1
nagios-3.0.2
nagios-3.0.3
nagios-3.0.4
nagios-3.0.5
nagios-3.0.6
nagios-3.0a1
nagios-3.0a2
nagios-3.0a3
nagios-3.0a4
nagios-3.0a5
nagios-3.0b1
nagios-3.0b2
nagios-3.0b3
nagios-3.0b4
nagios-3.0b5
nagios-3.0b6
nagios-3.0b7
nagios-3.0rc1
nagios-3.0rc2
nagios-3.0rc3
nagios-3.1.0
nagios-3.1.1
nagios-3.1.2
nagios-3.2.0
nagios-3.2.1
nagios-3.2.2
nagios-3.2.3
nagios-3.3.1
nagios-3.4.0
nagios-3.4.1
nagios-4.*
nagios-4.0.0
nagios-4.0.0-beta1
nagios-4.0.0-beta2
nagios-4.0.0-beta3
nagios-4.0.0-beta4
nagios-4.0.4
nagios-4.0.5
nagios-4.0.6
nagios-4.1.0
nagios-4.1.0rc2
nagios-4.1.1
nagios-4.2.2
nagios-4.3.0
nagios-4.3.1
nagios-4.3.2
nagios-4.3.3
nagios-4.3.4
nagios-4.4.0
nagios-4.4.1
nagios-4.4.10
nagios-4.4.11
nagios-4.4.12
nagios-4.4.13
nagios-4.4.14
nagios-4.4.3
nagios-4.4.3rc1
nagios-4.4.4
nagios-4.4.5
nagios-4.4.6
nagios-4.4.7
nagios-4.4.8
nagios-4.4.9
nagios-4.5.0
nagios-4.5.1
nagios-4.5.10
nagios-4.5.11
nagios-4.5.12
nagios-4.5.2
nagios-4.5.3
nagios-4.5.4
nagios-4.5.5
nagios-4.5.6
nagios-4.5.7
nagios-4.5.8
nagios-4.5.9
release-4.*
release-4.2.4
release-4.3.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-48549.json"