CVE-2026-8593Network attack vector

Authenticated BI rule deletion via missing authorization

Published Jul 21, 2026 · Updated Jul 21, 2026

Missing authorization in Checkmk allows remote authenticated users to delete BI rules through crafted REST API requests. The BI rule deletion handler accepts a rule identifier and performs the deletion without checking permission to customize the containing BI pack. The issue affects 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; exploitation requires REST API access, two action-related permissions, and knowledge of a rule identifier.

CVSS severity5.3
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in Checkmk allows remote authenticated users to delete BI rules through crafted REST API requests. The BI rule deletion handler accepts a rule identifier and performs the deletion without checking permission to customize the containing BI pack. The issue affects 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; exploitation requires REST API access, two action-related permissions, and knowledge of a rule identifier.

The record

CVE
CVE-2026-8593
Published
Jul 21, 2026
Updated
Jul 21, 2026
Vendor
Checkmk GmbH
Product
Checkmk
Classifications
CWE-862, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 21, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 21, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.3.0 <2.3.0p49
  2. Affected versionversion=2.4.0 <2.4.0p34
  3. Affected versionversion=2.5.0 <2.5.0p9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Checkmk GmbH · Checkmkversion=2.3.0 <2.3.0p49; version=2.4.0 <2.4.0p34; version=2.5.0 <2.5.0p9

Published CVSS scores

5.3Checkmk GmbHCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
T1565.001Stored Data Manipulation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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