CVE-2026-7765 MEDIUM

CVE-2026-7765: User Messages widget leaked issuer messages on shared dashboards

Vendor Checkmk Gmbh
Product Checkmk
Weakness CWE-863 · Incorrect authorization
Published June 8, 2026
Last update June 8, 2026
View on NVD All CVEs

CVSS base score

6.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

June 8, 2026 CVE published
June 8, 2026 Record updated