UBUNTU-CVE-2026-48551

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Source
https://ubuntu.com/security/CVE-2026-48551
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-48551.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-48551
Upstream
Published
2026-08-12T17:17:00Z
Modified
2026-08-19T11:05:27Z
Severity
  • 7.4 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:N CVSS Calculator
  • 6.1 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:N/SI:H/SA:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

Nagios Core before 4.5.14 and Nagios XI before 2026R1.7 contain a cross-site request forgery protection bypass via a self-supplied double-submit cookie. An attacker can supply matching cookie and request parameter values to bypass CSRF protection, enabling unauthenticated attackers to run commands as authorized users via malicious links.

References

Affected packages

Ubuntu:20.04:LTS / nagios4

Package

Name
nagios4
Purl
pkg:deb/ubuntu/nagios4?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

4.*
4.3.4-3
4.3.4-3ubuntu0.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "nagios4",
            "binary_version": "4.3.4-3ubuntu0.1"
        },
        {
            "binary_name": "nagios4-cgi",
            "binary_version": "4.3.4-3ubuntu0.1"
        },
        {
            "binary_name": "nagios4-common",
            "binary_version": "4.3.4-3ubuntu0.1"
        },
        {
            "binary_name": "nagios4-core",
            "binary_version": "4.3.4-3ubuntu0.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-48551.json"

Ubuntu:22.04:LTS / nagios4

Package

Name
nagios4
Purl
pkg:deb/ubuntu/nagios4?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

4.*
4.4.6-4
4.4.6-4ubuntu0.22.04.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "nagios4",
            "binary_version": "4.4.6-4ubuntu0.22.04.1"
        },
        {
            "binary_name": "nagios4-cgi",
            "binary_version": "4.4.6-4ubuntu0.22.04.1"
        },
        {
            "binary_name": "nagios4-common",
            "binary_version": "4.4.6-4ubuntu0.22.04.1"
        },
        {
            "binary_name": "nagios4-core",
            "binary_version": "4.4.6-4ubuntu0.22.04.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-48551.json"

Ubuntu:24.04:LTS / nagios4

Package

Name
nagios4
Purl
pkg:deb/ubuntu/nagios4?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

4.*
4.4.6-4
4.4.6-4ubuntu0.24.04.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "nagios4",
            "binary_version": "4.4.6-4ubuntu0.24.04.1"
        },
        {
            "binary_name": "nagios4-cgi",
            "binary_version": "4.4.6-4ubuntu0.24.04.1"
        },
        {
            "binary_name": "nagios4-common",
            "binary_version": "4.4.6-4ubuntu0.24.04.1"
        },
        {
            "binary_name": "nagios4-core",
            "binary_version": "4.4.6-4ubuntu0.24.04.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-48551.json"

Ubuntu:26.04:LTS / nagios4

Package

Name
nagios4
Purl
pkg:deb/ubuntu/nagios4?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

4.*
4.4.6-4.1ubuntu1
4.4.6-4.1ubuntu2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "nagios4",
            "binary_version": "4.4.6-4.1ubuntu2"
        },
        {
            "binary_name": "nagios4-cgi",
            "binary_version": "4.4.6-4.1ubuntu2"
        },
        {
            "binary_name": "nagios4-common",
            "binary_version": "4.4.6-4.1ubuntu2"
        },
        {
            "binary_name": "nagios4-core",
            "binary_version": "4.4.6-4.1ubuntu2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-48551.json"