CVE-2026-7765
User Messages widget leaked issuer messages on shared dashboards
- State
- Published
- Severity
- 6.3 Medium
- Published
- Jun 8, 2026
- Updated
- Jun 8, 2026
- Reserved
- May 4, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.3 Medium | 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 | Checkmk |
Weaknesses
- CWE-863 Incorrect Authorization
Affected Products
| Product | Versions |
|---|---|
CheckmkCheckmk GmbH |
|
References
- https://checkmk.com/werk/19815vendor-advisory
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