CVE-2020-8561

    Dashboard / Vulnerabilities / CVE-2020-8561

    CVE-2020-8561

    Published: 20 Sept 2021Last Modified: 7 Aug 2026

    Summary:

    Details: A security issue was discovered in Kubernetes where actors that control the responses of MutatingWebhookConfiguration or ValidatingWebhookConfiguration requests are able to redirect kube-apiserver requests to private networks of the apiserver. If that user can view kube-apiserver logs when the log level is set to 10, they can view the redirected responses and headers in the logs.

    References: https://security.netapp.com/advisory/ntap-20211014-0002/, https://github.com/kubernetes/kubernetes/issues/104720, https://groups.google.com/g/kubernetes-security-announce/c/RV2IhwcrQsY, https://kubernetes.io/blog/2026/05/26/reconciling-unfixed-kubernetes-cves/

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 544b7f5b5cd8483cc60cd1844269b9a49ebc9c93
    Fixed -None

    Affected versions

    1.20.11-NA

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2020-8561 | CVE-DB