Access Control Flaw in Checkmk Reporting Functionality
CVE-2026-15227

5.3MEDIUM

Key Information:

Vendor

Checkmk Gmbh

Status
Checkmk
Vendor
CVE Published:
31 July 2026

What is CVE-2026-15227?

A vulnerable component in Checkmk allows authenticated users without the 'Edit foreign Reports' permission to modify reports created by other users. This lack of proper access control can potentially lead to unauthorized changes in report data, impacting data integrity and user trust.

Affected Version(s)

Checkmk 2.5.0 < 2.5.0p10

Checkmk 2.4.0 < 2.4.0p35

Checkmk 2.3.0 < 2.3.0p49

References

https://checkmk.com/werk/20003
vendor-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Jose Sharon (EY GmbH)
Pratheesh P. Narayanan (EY GmbH)
.