What is CVE-2018-11747?

CVE-2018-11747 is a critical-severity vulnerability in Puppet Discovery, classified under Improper Certificate Validation. CVSS score: 9.8/10. Published 2019-03-21.

How severe is CVE-2018-11747?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Puppet Discovery

CVE-2018-11747

Previously, Puppet Discovery was shipped with a default generated TLS certificate in the nginx container. In version 1.4.0, a unique certificate will be generated on installation or the user will be able to provide their own TLS certificate for ingress.

Vulnerability class: Improper Certificate Validation

Published 2019-03-21 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.007 (52.2th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 52nd percentile — 52.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Puppet Discovery
Puppet Discovery — versions all versions prior to 1.4.0

Weakness classification (CWE)

CWE-295 — Improper Certificate Validation

References

puppet.com/security/cve/CVE-2018-11747 (Vendor Advisory)
lists.apache.org/thread.html/rd0e44e8ef71eeaaa3cf3d1b8b41eb25894372e2995ec908ce… (mailing-list)

Frequently asked questions

What is CVE-2018-11747?: CVE-2018-11747 is a critical-severity vulnerability in Puppet Discovery, classified under Improper Certificate Validation. CVSS score: 9.8/10. Published 2019-03-21.
How severe is CVE-2018-11747?: Critical severity. CVSS v3 base score is 9.8 out of 10.