Checkmk up to 2.5.0p9 certificate validation

Summaryinfo

A vulnerability was found in Checkmk and classified as problematic. This issue affects some unknown processing. Executing a manipulation can lead to certificate validation. This vulnerability is registered as CVE-2026-15937. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability classified as problematic was found in Checkmk. This vulnerability affects an unknown code. The manipulation with an unknown input leads to a certificate validation vulnerability. The CWE definition for the vulnerability is CWE-295. The product does not validate, or incorrectly validates, a certificate. As an impact it is known to affect integrity. CVE summarizes:

Improper certificate validation in Checkmk <2.5.0p10 allows a relay and a push agent that share the same UUID to reuse each other's mTLS certificate to authenticate against agent receiver endpoints in either direction, because the endpoints do not verify that the certificate was issued by their own root certificate.

The advisory is available at checkmk.com. This vulnerability was named CVE-2026-15937 since 07/16/2026. The exploitation appears to be difficult. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1587.003 by the MITRE ATT&CK project.

Upgrading to version 2.5.0p10 eliminates this vulnerability.

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Productinfo

Name

• Checkmk

Version

• 1.6.0p17
• 1.6.0p19
• 1.6.0p28
• 1.6.0p29
• 1.6.4
• 1.6.5
• 1.6.8
• 1.9.48
• 2.0.0p19
• 2.0.0p20
• 2.0.0p24
• 2.0.0p25
• 2.0.0p26
• 2.0.0p27
• 2.0.0p28
• 2.0.0p29
• 2.0.0p31
• 2.0.0p32
• 2.0.0p34
• 2.0.0p37
• 2.1.0b9
• 2.1.0b10
• 2.1.0p1
• 2.1.0p3
• 2.1.0p6
• 2.1.0p10
• 2.1.0p11
• 2.1.0p13
• 2.1.0p17
• 2.1.0p18
• 2.1.0p19
• 2.1.0p23
• 2.1.0p25
• 2.1.0p26
• 2.1.0p27
• 2.1.0p31
• 2.1.0p36
• 2.1.0p37
• 2.1.0p40
• 2.1.0p41
• 2.1.0p42
• 2.1.0p43
• 2.1.0p44
• 2.1.0p45
• 2.1.0p46
• 2.1.0p47
• 2.1.0p48
• 2.1.0p51
• 2.1.0p98
• 2.1.0p99
• 2.2.0
• 2.2.0b3
• 2.2.0b4
• 2.2.0b6
• 2.2.0b7
• 2.2.0i1
• 2.2.0p3
• 2.2.0p7
• 2.2.0p10
• 2.2.0p11
• 2.2.0p12
• 2.2.0p13
• 2.2.0p14
• 2.2.0p15
• 2.2.0p16
• 2.2.0p17
• 2.2.0p22
• 2.2.0p23
• 2.2.0p24
• 2.2.0p25
• 2.2.0p26
• 2.2.0p27
• 2.2.0p28
• 2.2.0p30
• 2.2.0p31
• 2.2.0p32
• 2.2.0p34
• 2.2.0p35
• 2.2.0p36
• 2.2.0p37
• 2.2.0p38
• 2.2.0p39
• 2.2.0p40
• 2.2.0p41
• 2.2.0p42
• 2.2.0p43
• 2.2.0p44
• 2.2.0p45
• 2.2.0p46
• 2.2.0p152.2.0p16
• 2.3.0
• 2.3.0b3
• 2.3.0b4
• 2.3.0b5
• 2.3.0p3
• 2.3.0p6
• 2.3.0p7
• 2.3.0p10
• 2.3.0p13
• 2.3.0p14
• 2.3.0p15
• 2.3.0p17
• 2.3.0p21
• 2.3.0p22
• 2.3.0p24
• 2.3.0p25
• 2.3.0p26
• 2.3.0p28
• 2.3.0p29
• 2.3.0p31
• 2.3.0p32
• 2.3.0p34
• 2.3.0p35
• 2.3.0p37
• 2.3.0p38
• 2.3.0p39
• 2.3.0p40
• 2.3.0p41
• 2.3.0p42
• 2.3.0p43
• 2.3.0p44
• 2.3.0p45
• 2.3.0p46
• 2.3.0p47
• 2.3.0p48
• 2.3.0p49
• 2.3.0p50
• 2.4.0
• 2.4.0b1
• 2.4.0b5
• 2.4.0b6
• 2.4.0b7
• 2.4.0p0
• 2.4.0p1
• 2.4.0p5
• 2.4.0p6
• 2.4.0p12
• 2.4.0p13
• 2.4.0p14
• 2.4.0p15
• 2.4.0p16
• 2.4.0p17
• 2.4.0p18
• 2.4.0p20
• 2.4.0p21
• 2.4.0p22
• 2.4.0p23
• 2.4.0p24
• 2.4.0p25
• 2.4.0p26
• 2.4.0p28
• 2.4.0p29
• 2.4.0p30
• 2.4.0p31
• 2.4.0p33
• 2.4.0p34
• 2.4.0p35
• 2.4.0p36
• 2.5.0b1
• 2.5.0b2
• 2.5.0b3
• 2.5.0b4
• 2.5.0p1
• 2.5.0p2
• 2.5.0p4
• 2.5.0p5
• 2.5.0p8
• 2.5.0p9

CPE 2.3info

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Entryinfo

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