UBUNTU-CVE-2026-33456

Source
https://ubuntu.com/security/CVE-2026-33456
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33456.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-33456
Upstream
Published
2026-04-10T09:16:00Z
Modified
2026-04-27T18:56:53Z
Severity
  • 5.1 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N CVSS Calculator
  • 7.6 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

Livestatus injection in the notification test mode in Checkmk <2.5.0b4 and <2.4.0p26 allows an authenticated user with access to the notification test page to inject arbitrary Livestatus commands via a crafted service description.

References

Affected packages

Ubuntu:Pro:16.04:LTS / check-mk

Package

Name
check-mk
Purl
pkg:deb/ubuntu/check-mk@1.2.6p12-1ubuntu0.16.04.1+esm1?arch=source&distro=esm-apps/xenial

Affected ranges

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

Affected versions

1.*
1.2.6p5-1
1.2.6p12-1
1.2.6p12-1ubuntu0.16.04.1
1.2.6p12-1ubuntu0.16.04.1+esm1

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "check-mk-agent",
            "binary_version": "1.2.6p12-1ubuntu0.16.04.1+esm1"
        },
        {
            "binary_name": "check-mk-agent-logwatch",
            "binary_version": "1.2.6p12-1ubuntu0.16.04.1+esm1"
        },
        {
            "binary_name": "check-mk-config-icinga",
            "binary_version": "1.2.6p12-1ubuntu0.16.04.1+esm1"
        },
        {
            "binary_name": "check-mk-config-nagios3",
            "binary_version": "1.2.6p12-1ubuntu0.16.04.1+esm1"
        },
        {
            "binary_name": "check-mk-livestatus",
            "binary_version": "1.2.6p12-1ubuntu0.16.04.1+esm1"
        },
        {
            "binary_name": "check-mk-multisite",
            "binary_version": "1.2.6p12-1ubuntu0.16.04.1+esm1"
        },
        {
            "binary_name": "check-mk-server",
            "binary_version": "1.2.6p12-1ubuntu0.16.04.1+esm1"
        }
    ]
}

Database specific

source
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33456.json"

Ubuntu:18.04:LTS / check-mk

Package

Name
check-mk
Purl
pkg:deb/ubuntu/check-mk@1.2.8p16-1ubuntu0.2?arch=source&distro=bionic

Affected ranges

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

Affected versions

1.*
1.2.8p16-1ubuntu0.1
1.2.8p16-1ubuntu0.2

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "check-mk-agent",
            "binary_version": "1.2.8p16-1ubuntu0.2"
        },
        {
            "binary_name": "check-mk-agent-logwatch",
            "binary_version": "1.2.8p16-1ubuntu0.2"
        },
        {
            "binary_name": "check-mk-config-icinga",
            "binary_version": "1.2.8p16-1ubuntu0.2"
        },
        {
            "binary_name": "check-mk-livestatus",
            "binary_version": "1.2.8p16-1ubuntu0.2"
        },
        {
            "binary_name": "check-mk-multisite",
            "binary_version": "1.2.8p16-1ubuntu0.2"
        },
        {
            "binary_name": "check-mk-server",
            "binary_version": "1.2.8p16-1ubuntu0.2"
        }
    ]
}

Database specific

source
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33456.json"