Checkmk up to 2.2.0/2.3.0p47/2.4.0p30/2.5.0p4 URL Dashboard Widget cross site scripting

CVSS Meta Temp Score
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CTI Interest Score
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3.4$0-$5k0.65

Summaryinfo

A vulnerability was found in Checkmk up to 2.2.0/2.3.0p47/2.4.0p30/2.5.0p4. It has been classified as problematic. This vulnerability affects unknown code of the component URL Dashboard Widget. The manipulation leads to cross site scripting. This vulnerability is referenced as CVE-2026-7186. Remote exploitation of the attack is possible. No exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Checkmk up to 2.2.0/2.3.0p47/2.4.0p30/2.5.0p4 and classified as problematic. This issue affects an unknown code block of the component URL Dashboard Widget. The manipulation with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Impacted is integrity. The summary by CVE is:

Stored cross-site scripting in the URL dashboard widget in Checkmk <2.5.0p5, <2.4.0p31, <2.3.0p48, and all 2.2.0 versions allows a user with dashboard editing permissions to store a URL with a dangerous URI scheme such as javascript: that executes scripts in other users' browsers when they view the dashboard.

The advisory is shared at checkmk.com. The identification of this vulnerability is CVE-2026-7186 since 04/27/2026. The exploitation is known to be easy. The attack may be initiated remotely. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

Upgrading to version 2.3.0p48, 2.4.0p31 or 2.5.0p5 eliminates this vulnerability.

The vulnerability is also documented in the databases at EUVD (EUVD-2026-35061) and CERT Bund (WID-SEC-2026-1817). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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: 3.5
VulDB Meta Temp Score: 3.4

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

Class: Cross site scripting
CWE: CWE-79 / CWE-94 / CWE-74
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Checkmk 2.3.0p48/2.4.0p31/2.5.0p5

Timelineinfo

04/27/2026 CVE reserved
06/08/2026 +42 days Advisory disclosed
06/08/2026 +0 days VulDB entry created
06/09/2026 +1 days VulDB entry last update

Sourcesinfo

Advisory: checkmk.com
Status: Confirmed

CVE: CVE-2026-7186 (🔒)
GCVE (CVE): GCVE-0-2026-7186
GCVE (VulDB): GCVE-100-369185
EUVD: 🔒
CERT Bund: WID-SEC-2026-1817 - Checkmk: Mehrere Schwachstellen erm&ouml;glichen Cross-Site Scripting

Entryinfo

Created: 06/08/2026 15:17
Updated: 06/09/2026 11:55
Changes: 06/08/2026 15:17 (66), 06/08/2026 17:31 (1), 06/09/2026 11:55 (7)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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