5.3

CVE-2026-8593: checkmk gmbh checkmk Missing Authorization

CVSS: 5.3v4.0MediumDeferred
AliasesUBUNTU-CVE-2026-8593
Published 21-07-2026Last modified 21-07-2026
Open JSON

Vulnerability summary

CVE-2026-8593 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. 21-07-2026
    PublishedVulnerability first disclosed.
  2. 21-07-2026
    Last modifiedVulnerability information updated.

Description

Improper permission enforcement in Checkmk versions 2.5.0 before 2.5.0p9, 2.4.0 before 2.4.0p34, 2.3.0 before 2.3.0p49, and 2.2.0 (EOL) allows users without permissions to view and modify BI packs and rules

CVSS metrics

3 scores · 3 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
  • checkmk≥ 2.5.0, < 2.5.0p9 | ≥ 2.4.0, < 2.4.0p34 | ≥ 2.3.0, < 2.3.0p49
Ubuntu1 product
  • check-mkAll versions (No fix recorded)

2 vendors · 2 products

References

3 links