UBUNTU-CVE-2026-48550

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Source
https://ubuntu.com/security/CVE-2026-48550
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-48550.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-48550
Upstream
Published
2026-08-13T00:00:00Z
Modified
2026-08-13T19:30:21.549377126Z
Severity
  • 6.1 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N CVSS Calculator
  • 5.1 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

Nagios Core before 4.5.14 and Nagios XI before 2026R1.7 are vulnerable to reflected cross-site scripting in cmd.cgi via the NagFormId parameter. An unauthenticated remote attacker can craft a malicious link that, when followed by an authenticated user, executes arbitrary JavaScript in the victim's browser.

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
0Unknown introduced version / All previous versions are affected

Affected versions

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

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "4.3.4-3ubuntu0.1",
            "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"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-48550.json"

Ubuntu:22.04:LTS / nagios4

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown 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_version": "4.4.6-4ubuntu0.22.04.1",
            "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"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-48550.json"

Ubuntu:24.04:LTS / nagios4

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown 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_version": "4.4.6-4ubuntu0.24.04.1",
            "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"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-48550.json"

Ubuntu:26.04:LTS / nagios4

Package

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

Affected ranges

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

Affected versions

4.*
4.4.6-4.1ubuntu1
4.4.6-4.1ubuntu2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "4.4.6-4.1ubuntu2",
            "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"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-48550.json"