Checkmk up to 2.2.0/2.3.0p42/2.4.0p22 remove_password authorization

CVSS Meta Temp Score
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CTI Interest Score
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5.3$0-$5k0.00

Summaryinfo

A vulnerability labeled as problematic has been found in Checkmk up to 2.2.0/2.3.0p42/2.4.0p22. Affected by this vulnerability is the function remove_password. Such manipulation leads to authorization. This vulnerability is uniquely identified as CVE-2026-3103. The attack can be launched remotely. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Checkmk up to 2.2.0/2.3.0p42/2.4.0p22. It has been rated as problematic. Affected by this issue is the function remove_password. The manipulation with an unknown input leads to a authorization vulnerability. Using CWE to declare the problem leads to CWE-863. The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. This allows attackers to bypass intended access restrictions. Impacted is integrity, and availability. CVE summarizes:

A logic error in the remove_password() function in Checkmk GmbH's Checkmk versions <2.4.0p23, <2.3.0p43, and 2.2.0 (EOL) allows a low-privileged user to cause data loss.

The advisory is available at checkmk.com. This vulnerability is handled as CVE-2026-3103 since 02/24/2026. The exploitation is known to be easy. The attack may be launched remotely. Technical details are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 301146 (Linux Distros Unpatched Vulnerability : CVE-2026-3103), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 2.3.0p43 or 2.4.0p23 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (301146) and CERT Bund (WID-SEC-2026-0596). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

  • Checkmk Checkmk

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.4
VulDB Temp Score: 5.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 5.4
NVD Vector: 🔒

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Authorization
CWE: CWE-863 / CWE-285 / CWE-266
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 301146
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-3103

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Checkmk 2.3.0p43/2.4.0p23

Timelineinfo

02/24/2026 CVE reserved
03/04/2026 +8 days Advisory disclosed
03/04/2026 +0 days VulDB entry created
03/07/2026 +3 days VulDB entry last update

Sourcesinfo

Advisory: checkmk.com
Status: Confirmed

CVE: CVE-2026-3103 (🔒)
GCVE (CVE): GCVE-0-2026-3103
GCVE (VulDB): GCVE-100-348722
CERT Bund: WID-SEC-2026-0596 - Checkmk: Schwachstelle erm&ouml;glicht Denial of Service

Entryinfo

Created: 03/04/2026 15:41
Updated: 03/07/2026 01:55
Changes: 03/04/2026 15:41 (65), 03/05/2026 11:38 (7), 03/06/2026 09:01 (10), 03/06/2026 15:56 (1), 03/07/2026 01:55 (2)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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