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Medium, CVSS 5.3

Sensitive Information leak via Log File in Kubernetes

CVE-2020-8566GHSA-5x96-j797-5qqw

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (github.com/kubernetes/kubernetes 1.19.3, 1.18.10, 1.17.13), redeploy, then verify what is actually installed.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS
5.3 · CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
EPSS
  • CVE-2020-8566: 0.53% estimated exploitation activity in the next 30 days; percentile 44.63 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
Source description

As published by the source; long descriptions are shortened.

In Kubernetes clusters using Ceph RBD as a storage provisioner, with logging level of at least 4, Ceph RBD admin secrets can be written to logs. This occurs in kube-controller-manager's logs during provisioning of Ceph RBD persistent claims. This affects < v1.19.3, < v1.18.10, < v1.17.13.

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 1 · created ·

    Published from ghsa record GHSA-5x96-j797-5qqw

Agent brief

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# Patch Next advisory brief: CVE-2020-8566

Advisory: Sensitive Information leak via Log File in Kubernetes
IDs: CVE-2020-8566, GHSA-5x96-j797-5qqw
Record: https://patchnext.com/advisories/cve-2020-8566 (revision 1, source checked 26 Oct 2026, 15:03 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 5.3)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: github.com/kubernetes/kubernetes 1.19.3, 1.18.10, 1.17.13. A vendor fix does not mean a deployment is fixed.

## Affected components
- Go github.com/kubernetes/kubernetes: affected < 1.17.13; >= 1.18.0, < 1.18.10; >= 1.19.0, < 1.19.3; fixed in 1.18.10, 1.19.3, 1.17.13

## Suggested inspection (read-only)
- Go github.com/kubernetes/kubernetes: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on github.com/kubernetes/kubernetes.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-5x96-j797-5qqw (GitHub-reviewed advisory GHSA-5x96-j797-5qqw lists affected ranges: Go github.com/kubernetes/kubernetes >=0 =1.18.0 =1.19.0 <1.19.3)

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