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CVE-2022-36049: Flux2 is a tool for keeping Kubernetes clusters in sync with sources of configuration, and Flux's helm-control

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HIGH 7.7WATCHLISTUPGRADEUPGRADEUPGRADE

CVE-2022-36049 is a high-severity flaw (CVSS 7.7) affecting helm, flux2, helm-controller. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Flux2 is a tool for keeping Kubernetes clusters in sync with sources of configuration, and Flux's helm-controller is a Kubernetes operator that allows one to declaratively manage Helm chart releases. Helm controller is tightly integrated with the Helm SDK. A vulnerability found in the Helm SDK that affects flux2 v0.0.17 until v0.32.0 and helm-controller v0.0.4 until v0.23.0 allows for specific data inputs to cause high memory consumption. In some

Why this priority

  • High severity
  • On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score7.7 (High)
Attack vectorNetwork (remote)
Attack complexityLow
Privileges neededLow
User interactionNone
EPSS exploit chance1.4% (top 27%)
CISA exploited listNo
WeaknessCWE-400, CWE-770
Published2022-09-07
Last modified2026-06-17
Publisher (CNA): GitHub, Inc. · Vendor: fluxcd · helm

Share: LinkedIn · X · Reddit

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

Am I affected?

Timeline

helm helm UPGRADE
Affected: >= 3.0.0 and < 3.9.4
Fixed in: 3.9.4
Safe to downgrade to: a release before 3.0.0
1. Check installed version
apt-cache policy helm || rpm -q helm || helm --version
2. UPGRADE to 3.9.4 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade helm
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade helm
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 3.0.0 (Debian / Ubuntu)
apt-cache madison helm sudo apt install helm=<VERSION_BEFORE_3.0.0> sudo apt-mark hold helm
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list helm sudo dnf downgrade helm-<VERSION_BEFORE_3.0.0> sudo dnf versionlock add helm
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.
fluxcd flux2 UPGRADE
Affected: >= 0.0.17 and < 0.32.0
Fixed in: 0.32.0
Safe to downgrade to: a release before 0.0.17
1. Check installed version
apt-cache policy flux2 || rpm -q flux2 || flux2 --version
2. UPGRADE to 0.32.0 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade flux2
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade flux2
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 0.0.17 (Debian / Ubuntu)
apt-cache madison flux2 sudo apt install flux2=<VERSION_BEFORE_0.0.17> sudo apt-mark hold flux2
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list flux2 sudo dnf downgrade flux2-<VERSION_BEFORE_0.0.17> sudo dnf versionlock add flux2
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.
fluxcd helm-controller UPGRADE
Affected: >= 0.0.4 and < 0.23.0
Fixed in: 0.23.0
Safe to downgrade to: a release before 0.0.4
1. Check installed version
apt-cache policy helm-controller || rpm -q helm-controller || helm-controller --version
2. UPGRADE to 0.23.0 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade helm-controller
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade helm-controller
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 0.0.4 (Debian / Ubuntu)
apt-cache madison helm-controller sudo apt install helm-controller=<VERSION_BEFORE_0.0.4> sudo apt-mark hold helm-controller
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list helm-controller sudo dnf downgrade helm-controller-<VERSION_BEFORE_0.0.4> sudo dnf versionlock add helm-controller
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.
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-2022-36049?

helm: upgrade to 3.9.4; flux2: upgrade to 0.32.0; helm-controller: upgrade to 0.23.0. Exact commands for each OS are on this page.

Is CVE-2022-36049 being exploited?

CVE-2022-36049 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-2022-36049 affect?

CVE-2022-36049 affects helm, flux2, helm-controller. Severity is high (CVSS 7.7). Flux2 is a tool for keeping Kubernetes clusters in sync with sources of configuration, and Flux's helm-controller is a Kubernetes operator that allows one to declaratively manage Helm chart releases. Helm controller is tightly integrated wi

How urgent is CVE-2022-36049?

Priority 50/100. High severity; On your watchlist

Software pages

Kubernetes vulnerabilities · Helm vulnerabilities

Related CVEs

References

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