5.3

CVE-2026-15227: checkmk gmbh checkmk Missing Authorization

CVSS: 5.3v4.0MediumDeferred
Published 31-07-2026Last modified 31-07-2026
Open JSON

Vulnerability summary

CVE-2026-15227 is a medium (CVSS 5.3) Missing Authorization vulnerability in checkmk gmbh checkmk. EPSS estimates a 0.35% chance of exploitation in the next 30 days, higher than 27.4% of scored vulnerabilities.

Overall risk
21/100
0100
Low · default modelHow is this calculated?
CVSS score
5.3/10
010
Medium · v4.0 (CVE.org)
EPSS score
0.35%
0%100%
Low · +0.14 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 31-07-2026
    PublishedVulnerability first disclosed.
  2. 31-07-2026
    Last modifiedVulnerability information updated.

Description

Missing authorization in Checkmk <2.5.0p10, <2.4.0p35, <2.3.0p49, and 2.2.0 (EOL) allows an authenticated user lacking the "Edit foreign Reports" permission to modify reports owned by other users.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.35%

Chance of exploitation in the next 30 days

Percentile

27%

Versus all other CVEs

30-day change

+0.14 pp

From 0.21% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.35%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Checkmk gmbh1 product
  • checkmkEOL≥ 2.5.0, < 2.5.0p10 | ≥ 2.4.0, < 2.4.0p35 | ≥ 2.3.0, < 2.3.0p49 | 2.2.0

1 vendor · 1 product

References

1 links