---
id: CVE-2026-7765
title: >-
  Incorrect authorization in the User Messages dashboard widget in Checkmk
  <2.5.0p5 causes the message-fetching endpoints to return the dashboard
  creator's messages rather than the viewer's, allowing an attacker who knows a
  valid public da…
summary: >-
  Incorrect authorization in the User Messages dashboard widget in Checkmk
  <2.5.0p5 causes the message-fetching endpoints to return the dashboard
  creator's messages rather than the viewer's, allowing an attacker who knows a
  valid public da…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N'
cwe:
  - CWE-863
vendor: checkmk
product: checkmk
affected:
  - checkmk = 2.5.0
published: '2026-06-08'
updated: '2026-10-06'
sourceUpdated: '2026-10-06T22:10:00.247'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-7765'
references:
  - url: 'https://checkmk.com/werk/19815'
    label: security@checkmk.com
tags:
  - nvd
epss: 0.00313
epssPercentile: 0.22078
ingestedAt: '2026-10-06T22:23:15.933Z'
---

## Overview

Incorrect authorization in the User Messages dashboard widget in Checkmk <2.5.0p5 causes the message-fetching endpoints to return the dashboard creator's messages rather than the viewer's, allowing an attacker who knows a valid public dashboard share token to read the issuer's personal messages by sending requests to the underlying endpoint, even without a User Messages widget present.

## Affected

- `checkmk = 2.5.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.