UBUNTU-CVE-2026-2859

See a problem?
Please try reporting it to the source first.
Source
https://ubuntu.com/security/CVE-2026-2859
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-2859.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-2859
Upstream
Published
2026-03-13T19:54:00Z
Modified
2026-03-20T08:07:22.922784Z
Severity
  • 6.3 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N CVSS Calculator
  • 4.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

Improper permission enforcement in Checkmk versions 2.4.0 before 2.4.0p23, 2.3.0 before 2.3.0p43, and 2.2.0 (EOL) allows unauthenticated users to enumerate existing hosts by observing different HTTP response codes in deploy_agent endpoint, which could lead to information disclosure.

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
0Unknown 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_version": "1.2.6p12-1ubuntu0.16.04.1+esm1",
            "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"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-2859.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
0Unknown introduced version / All previous versions are affected

Affected versions

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

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.2.8p16-1ubuntu0.2",
            "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"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-2859.json"