{"id":"CVE-2023-34091","aliases":["GHSA-hq4m-4948-64cc","GO-2023-1819"],"url":"https://o3.security/vulnerability/CVE-2023-34091","summary":"Kyverno resource with a deletionTimestamp may allow policy circumvention","details":"### Impact\n\nIn versions of Kyverno prior to 1.10.0, resources which have the `deletionTimestamp` field defined can bypass validate, generate, or mutate-existing policies, even in cases where the `validationFailureAction` field is set to `Enforce`. \n\nThis situation occurs as resources pending deletion were being consciously exempted by Kyverno, as a way to reduce processing load as policies are typically not applied to objects which are being deleted. \n\nHowever, this could potentially result in allowing a malicious user to leverage the [Kubernetes finalizers feature](https://kubernetes.io/docs/concepts/overview/working-with-objects/finalizers/) by setting a finalizer which causes the Kubernetes API server to set the `deletionTimestamp` and then not completing the delete operation as a way to explicitly to bypass a Kyverno policy. \n\nNote that this is not applicable to Kubernetes Pods but, as an example, a Kubernetes Service resource can be manipulated using an indefinite finalizer to bypass policies.\n\n\n### Patches\nThis is resolved in Kyverno 1.10.0.\n\n### Workarounds\nThere is no known workaround.\n\n### References\n_Are there any links users can visit to find out more?_\n","published":"2023-06-01T16:24:53.920Z","modified":"2026-08-12T03:51:42.730027562Z","cvss":{"score":6.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/kyverno/kyverno","fixedVersion":"1.10.0"}],"fix":null,"references":[{"type":"WEB","url":"https://github.com/kyverno/kyverno/releases/tag/v1.10.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/34xxx/CVE-2023-34091.json"},{"type":"ADVISORY","url":"https://github.com/kyverno/kyverno/security/advisories/GHSA-hq4m-4948-64cc"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-34091"},{"type":"PACKAGE","url":"https://github.com/kyverno/kyverno"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:42.730027562Z"}}