{"id":"CVE-2026-122305","title":"Kyverno before 1.19.2 Denial of Service via Nested Variable Substitution Loop","summary":"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 ann…","severity":"high","cvss":7.7,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H","cvssSource":"cna","cwe":["CWE-835"],"vendor":"kyverno","product":"kyverno","affected":["kyverno < 1.19.2"],"published":"2026-11-05","updated":"2026-11-05","sourceUpdated":"2026-11-05T02:25:09.571Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-122305","references":[{"url":"https://github.com/kyverno/kyverno/security/advisories/GHSA-338x-hgrv-626h","label":"GitHub Security Advisory (GHSA-338x-hgrv-626h)"},{"url":"https://www.vulncheck.com/advisories/kyverno-before-1.19.2-denial-of-service-via-nested-variable-substitution-loop","label":"VulnCheck Advisory: Kyverno before 1.19.2 Denial of Service via Nested Variable Substitution Loop"}],"tags":["cve.org"],"ingestedAt":"2026-11-05T21:36:00.683Z","epss":0.00301,"epssPercentile":0.22943,"slug":"CVE-2026-122305","body":"## Overview\n\nKyverno 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.\n\n## Affected\n\n- `kyverno < 1.19.2`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":42,"depthScoreParts":{"impact":42.4,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}