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Medium, CVSS 6.8

CNCF K3s Kubernetes kubelet configuration exposes credentials

CVE-2025-46599GHSA-864f-7xjm-2jp2

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (github.com/k3s-io/k3s 1.32.4-rc1), 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
6.8 · CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N
EPSS
  • CVE-2025-46599: 0.46% estimated exploitation activity in the next 30 days; percentile 39.79 (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.

CNCF K3s 1.32 before 1.32.4-rc1+k3s1 has a Kubernetes kubelet configuration change with the unintended consequence that, in some situations, ReadOnlyPort is set to 10255. For example, the default behavior of a K3s online installation might allow unauthenticated access to this port, exposing credentials.

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

    Published from ghsa record GHSA-864f-7xjm-2jp2

Agent brief

Preview the exact text before you copy it. Commands are read-only suggestions; review them before running anything.

# Patch Next advisory brief: CVE-2025-46599

Advisory: CNCF K3s Kubernetes kubelet configuration exposes credentials
IDs: CVE-2025-46599, GHSA-864f-7xjm-2jp2
Record: https://patchnext.com/advisories/cve-2025-46599 (revision 1, source checked 26 Oct 2026, 15:09 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 6.8)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: github.com/k3s-io/k3s 1.32.4-rc1. A vendor fix does not mean a deployment is fixed.

## Affected components
- Go github.com/k3s-io/k3s: affected >= 1.32.0-rc1, < 1.32.4-rc1; fixed in 1.32.4-rc1

## Suggested inspection (read-only)
- Go github.com/k3s-io/k3s: 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/k3s-io/k3s.
- 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-864f-7xjm-2jp2 (GitHub-reviewed advisory GHSA-864f-7xjm-2jp2 lists affected ranges: Go github.com/k3s-io/k3s >=1.32.0-rc1 <1.32.4-rc1)

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