High 7.1Published Oct 29, 2026

CVE-2026-117611Trust of compromised eMudhra root CA in bundled CA stores

Updated under an hour ago (Oct 30, 2026, 4:40 AM ET)

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It affects Checkmk GmbH Checkmk. Add what you run to find out whether that includes you.

EPSS puts the chance of exploitation in the next 30 days at 0.33%, higher than 26% of scored CVEs.

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Start free and add your stackFree account, 3 products Every CVE for Checkmk GmbH Checkmk Exploited in the last 30 days

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.

CVSS: 7.1 HIGH (v4.0, CNA)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
Weakness (CWE): CWE-295, CWE-1395
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): 0.33% (percentile 26)
Assigned by: Checkmk
NVD analysis: Deferred
Record last updated: Oct 29, 2026
First seen by InfoSec Signals: Oct 29, 2026

Affected products

Affected products

Checkmk GmbH Checkmk checkmk:checkmk (from the name)	from 2.5.0 before 2.5.0p18; from 2.4.0 before 2.4.0p39; from 2.3.0 before 2.3.0p52; 2.2.0	CNA record

References

References

https://checkmk.com/werk/22623	vendor-advisory
https://checkmk.com/werk/22169	vendor-advisory
https://github.com/advisories/GHSA-6q48-6c7w-9gw2	third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.