Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2026-33456

Severity CVSS v4.0:
MEDIUM
Type:
Unavailable / Other
Publication date:
10/04/2026
Last modified:
20/04/2026

Description

Livestatus injection in the notification test mode in Checkmk

Impact

Vector 4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N CVSS v4.0 Severity and Metrics:

Base Score: 5.10 MEDIUM
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N

Attack Vector (AV): Network
Attack Complexity (AC): Low
Attack Requirements (AT): None
Privileges Required (PR): High
User Interaction (UI): None
Confidentiality (VC): Low
Integrity (VI): Low
Availability (VA): Low
Confidentiality (SC): None
Integrity (SI): None
Availability (SA): None

Base Score 4.0
5.10
Severity 4.0
MEDIUM
Vector 3.x
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.60 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): Low
Integrity (I): Low
Availability (A): High

Base Score 3.x
7.60
Severity 3.x
HIGH

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:checkmk:checkmk:2.4.0:-:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:b1:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:b2:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:b3:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:b4:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:b5:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:b6:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p1:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p10:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p11:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p12:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p13:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p14:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p15:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.4.0:p16:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools