CVE-2026-117611 | BDVDB-2026-397806 Detail

CheckmkCheckmk

Description#

Improper certificate validation in Checkmk <2.5.0p18, <2.4.0p39, <2.3.0p52 and 2.2.0 (EOL): the Certificate Authority stores bundled with "certifi" and "webpki-roots" include a root CA that trusts eMudhra (emSign) intermediate certificates whose private keys are public.

Impact#

CAPEC-94: Adversary in the Middle

Weaknesses#

CWE-295 Improper Certificate Validation
CWE-1395 Dependency on Vulnerable Third-Party Component

References#

Exploit#

No public exploit known

History#

Version 12026-10-29Record published in the CVE List.

Published

Published: 2026-10-29
Last modified: 2026-10-29

Vendor information

Vendor: Checkmk
Product: Checkmk

All Checkmk vulnerabilities

Score

7.1 High

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 14.9.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Not classified

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
>= 2.5.0 and < 2.5.0p18
Fixed
2.5.0p18
Vulnerable
>= 2.4.0 and < 2.4.0p39
Fixed
2.4.0p39
Vulnerable
>= 2.3.0 and < 2.3.0p52
Fixed
2.3.0p52
Vulnerable
2.2.0
Fixed
Not stated

Scoring System

CVSS v4.0

7.1 High

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:H/SI:H/SA:H

Metric breakdown
Attack Vector	Network
Attack Complexity	Low
Attack Requirements	Present
Privileges Required	None
User Interaction	None
Vulnerable System Confidentiality	Low
Vulnerable System Integrity	Low
Vulnerable System Availability	None
Subsequent System Confidentiality	High
Subsequent System Integrity	High
Subsequent System Availability	High

CVSS v3.1

Not available

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).