CVE-2021-27026: A flaw was divered in Puppet Enterprise and other Puppet products where sensitive plan parameters may be logge

Q: How do I fix CVE-2021-27026?

puppet: upgrade to 2021.4.0; puppet connect: upgrade to 0.4.0; puppet enterprise: upgrade to 2019.8.9. Exact commands for each OS are on this page.

Q: Is CVE-2021-27026 being exploited?

CVE-2021-27026 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-27026 affect?

CVE-2021-27026 affects puppet, puppet connect, puppet enterprise. Severity is medium (CVSS 4.4). A flaw was divered in Puppet Enterprise and other Puppet products where sensitive plan parameters may be logged

Q: How urgent is CVE-2021-27026?

Priority 19/100. No elevated risk signals yet.

Routine

MEDIUM 4.4UPGRADEUPGRADEUPGRADE

CVE-2021-27026 is a medium-severity flaw (CVSS 4.4) affecting puppet, puppet connect, puppet enterprise. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	4.4 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	0.2% (top 84%)
CISA exploited list	No
Weakness	CWE-532
Published	2021-11-18
Last modified	2026-06-17

Publisher (CNA): Perforce · Vendor: puppet

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-11-18 15:15 UTCPublished CVE record published
2026-06-17 03:44 UTCUpdated Record last modified

puppet puppet UPGRADE

Affected: >= 2021.0.0 and < 2021.4.0

Fixed in: 2021.4.0

Safe to downgrade to: a release before 2021.0.0

1. Check installed version

apt-cache policy puppet || rpm -q puppet || puppet --version

2. UPGRADE to 2021.4.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade puppet

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade puppet

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 2021.0.0 (Debian / Ubuntu)

apt-cache madison puppet sudo apt install puppet=<VERSION_BEFORE_2021.0.0> sudo apt-mark hold puppet

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list puppet sudo dnf downgrade puppet-<VERSION_BEFORE_2021.0.0> sudo dnf versionlock add puppet

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

puppet puppet connect UPGRADE

Affected: < 0.4.0

Fixed in: 0.4.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy puppet-connect || rpm -q puppet-connect || puppet-connect --version

2. UPGRADE to 0.4.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade puppet-connect

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade puppet-connect

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

puppet puppet enterprise UPGRADE

Affected: < 2019.8.9

Fixed in: 2019.8.9

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy puppet-enterprise || rpm -q puppet-enterprise || puppet-enterprise --version

2. UPGRADE to 2019.8.9 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade puppet-enterprise

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade puppet-enterprise

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-27026?

puppet: upgrade to 2021.4.0; puppet connect: upgrade to 0.4.0; puppet enterprise: upgrade to 2019.8.9. Exact commands for each OS are on this page.

Is CVE-2021-27026 being exploited?

CVE-2021-27026 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-27026 affect?

CVE-2021-27026 affects puppet, puppet connect, puppet enterprise. Severity is medium (CVSS 4.4). A flaw was divered in Puppet Enterprise and other Puppet products where sensitive plan parameters may be logged

How urgent is CVE-2021-27026?

Priority 19/100. No elevated risk signals yet.

Related CVEs

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CVE-2021-27022 MEDIUM 4.9 UPGRADE UPGRADE A flaw was discovered in bolt-server and ace where running a task with sensitive parameters results in those s
CVE-2021-27021 HIGH 8.8 UPGRADE UPGRADE A flaw was discovered in Puppet DB, this flaw results in an escalation of privileges which allows the user to
CVE-2020-7942 MEDIUM 6.5 UPGRADE UPGRADE Previously, Puppet operated on a model that a node with a valid certificate was entitled to all information in
CVE-2018-6515 HIGH 7.8 UPGRADE Puppet Agent 1.10.x prior to 1.10.13, Puppet Agent 5.3.x prior to 5.3.7, and Puppet Agent 5.5.x prior to 5.5.2

References

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