Trust of compromised eMudhra root CA in bundled CA stores

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-117611
StatePUBLISHED
AssignerCheckmk
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-29 10:17:03 UTC
Updated2026-10-29 15:17:20 UTC
DescriptionImproper 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.

Risk And Classification

Primary CVSS: v4.0 7.1 HIGH from [email protected]

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS: 0.003270000 probability, percentile 0.257070000 (date 2026-10-29)

Problem Types: CWE-295 | CWE-295 CWE-295: Improper Certificate Validation | CWE-1395 CWE-1395: Dependency on Vulnerable Third-Party Component

VersionSourceTypeScoreSeverityVector
4.0[email protected]Secondary7.1HIGHCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:H/SI:H/SA:H/E:X/C...
4.0CNADECLARED7.1HIGHCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:H/SI:H/SA:H

CVSS v4.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
Present
Privileges Required
None
User Interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Sub Conf.
High
Sub Integrity
High
Sub Availability
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Checkmk GmbH Checkmk affected 2.5.0 2.5.0p18 semver Not specified
CNA Checkmk GmbH Checkmk affected 2.4.0 2.4.0p39 semver Not specified
CNA Checkmk GmbH Checkmk affected 2.3.0 2.3.0p52 semver Not specified
CNA Checkmk GmbH Checkmk affected 2.2.0 semver Not specified

References

ReferenceSourceLinkTags
checkmk.com/werk/22169 [email protected] checkmk.com
github.com/advisories/GHSA-6q48-6c7w-9gw2 [email protected] github.com
checkmk.com/werk/22623 [email protected] checkmk.com
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