HIGH 8.3 NVD
CVE-2026-122305
Kyverno before 1.19.2 contains a denial of service vulnerability in substituteVariablesIfAny that allows low-privileged users to hang the admission webhook via
Kyverno before 1.19.2 contains a denial of service vulnerability in substituteVariablesIfAny that allows low-privileged users to hang the admission webhook via self-referential variable templates. Attackers can create resources whose annotations re-introduce the embedded policy variable, causing unbounded substitution loops that exhaust CPU and memory and block cluster-wide admission.
References
- https://github.com/kyverno/kyverno/security/advisories/GHSA-338x-hgrv-626h
- https://www.vulncheck.com/advisories/kyverno-before-1.19.2-denial-of-service-via-nested-va
This high severity vulnerability with a CVSS score of 8.3 was published on 2026-11-05 via NVD.
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