vulnerability
Kubernetes: CVE-2021-25735: Validating Admission Webhook does not observe some previous fields
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 6 | (AV:N/AC:L/Au:S/C:N/I:P/A:P) | Sep 6, 2021 | Mar 10, 2022 | Aug 11, 2025 |
Severity
6
CVSS
(AV:N/AC:L/Au:S/C:N/I:P/A:P)
Published
Sep 6, 2021
Added
Mar 10, 2022
Modified
Aug 11, 2025
Description
A security issue was discovered in kube-apiserver that could allow node updates to bypass a Validating Admission Webhook. Clusters are only affected by this vulnerability if they run a Validating Admission Webhook for Nodes that denies admission based at least partially on the old state of the Node object. Validating Admission Webhook does not observe some previous fields.
Solutions
kubernetes-upgrade-1_18_18kubernetes-upgrade-1_19_10kubernetes-upgrade-1_20_6
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