What is CVE-2021-27026?

CVE-2021-27026 is a medium-severity vulnerability in Puppet, classified under Insertion of Sensitive Information into Log File. CVSS score: 4.4/10. Published 2021-11-18.

How severe is CVE-2021-27026?

Medium severity. CVSS v3 base score is 4.4 out of 10.

Information disclosure in Puppet

CVE-2021-27026

A flaw was divered in Puppet Enterprise and other Puppet products where sensitive plan parameters may be logged

Published 2021-11-18 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.002 (14.3th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 14th percentile — 14.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000

Affected products

Puppet
Puppet Connect
Puppet Enterprise
Puppet Enterprise, Connect — versions Puppet Enterprise prior to 2019.8.9, Puppet Enterprise prior to 2021.4.0

Weakness classification (CWE)

CWE-532 — Insertion of Sensitive Information into Log File

References

puppet.com/security/cve/cve-2021-27026 (Vendor Advisory)

Frequently asked questions

What is CVE-2021-27026?: CVE-2021-27026 is a medium-severity vulnerability in Puppet, classified under Insertion of Sensitive Information into Log File. CVSS score: 4.4/10. Published 2021-11-18.
How severe is CVE-2021-27026?: Medium severity. CVSS v3 base score is 4.4 out of 10.