CVE-2026-33457Network attack vector

Authenticated Livestatus command injection via unsanitized service description

Published Apr 10, 2026 · Updated Apr 10, 2026

Livestatus injection in Checkmk before 2.5.0b4, before 2.4.0p26, and before 2.3.0p47 allows remote authenticated users to inject commands. The prediction graph page interpolates a user-supplied service description into Livestatus queries without properly neutralizing query delimiters. Authenticated access to that page is required; a crafted service name injects arbitrary Livestatus commands processed by the site.

CVSS severity5.3
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Livestatus injection in Checkmk before 2.5.0b4, before 2.4.0p26, and before 2.3.0p47 allows remote authenticated users to inject commands. The prediction graph page interpolates a user-supplied service description into Livestatus queries without properly neutralizing query delimiters. Authenticated access to that page is required; a crafted service name injects arbitrary Livestatus commands processed by the site.

The record

CVE
CVE-2026-33457
Published
Apr 10, 2026
Updated
Apr 10, 2026
Vendor
Checkmk GmbH
Product
Checkmk
Classifications
CWE-140
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 10, 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 <2.3.0p47
  2. Affected versionversion=2.4.0 <2.4.0p26
  3. Affected versionversion=2.5.0 <2.5.0b4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Checkmk GmbH · Checkmkversion=2.3.0 <2.3.0p47; version=2.4.0 <2.4.0p26; version=2.5.0 <2.5.0b4

Published CVSS scores

6.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
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-140Improper Neutralization of Delimiters

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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