High severity7.7NVD Advisory· Published Nov 5, 2026

CVE-2026-122305

Description

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Kyverno/Kyvernollm-fuzzy
Range: <1.19.2

Patches

Vulnerability mechanics

References

github.com/kyverno/kyverno/security/advisories/GHSA-338x-hgrv-626hnvd
www.vulncheck.com/advisories/kyverno-before-1.19.2-denial-of-service-via-nested-variable-substitution-loopnvd

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cvss	0.501
epss	0.000
exploit	0.000
kev	0.000
patch	-0.070
ransomware	0.000