{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-122305","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","state":"PUBLISHED","assignerShortName":"VulnCheck","dateReserved":"2026-11-04T23:23:51.290Z","datePublished":"2026-11-05T02:25:09.571Z","dateUpdated":"2026-11-05T02:25:09.571Z"},"containers":{"cna":{"providerMetadata":{"orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","shortName":"VulnCheck","dateUpdated":"2026-11-05T02:25:09.571Z"},"datePublic":"2026-10-21T00:00:00.000Z","title":"Kyverno before 1.19.2 Denial of Service via Nested Variable Substitution Loop","descriptions":[{"lang":"en","value":"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."}],"problemTypes":[{"descriptions":[{"lang":"en","description":"Loop with Unreachable Exit Condition ('Infinite Loop')","cweId":"CWE-835","type":"CWE"}]}],"affected":[{"vendor":"kyverno","product":"kyverno","defaultStatus":"unaffected","packageURL":"pkg:golang/github.com/kyverno/kyverno","versions":[{"version":"0","status":"affected","versionType":"semver","lessThan":"1.19.2"},{"version":"1.19.2","status":"unaffected","versionType":"semver"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:kyverno:kyverno:*:*:*:*:*:*:*:*","versionEndExcluding":"1.19.2"}]}]}],"metrics":[{"format":"CVSS","cvssV4_0":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"HIGH","baseScore":8.3,"baseSeverity":"HIGH"}},{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH","baseScore":7.7,"baseSeverity":"HIGH"}}],"references":[{"url":"https://github.com/kyverno/kyverno/security/advisories/GHSA-338x-hgrv-626h","tags":["vendor-advisory"],"name":"GitHub Security Advisory (GHSA-338x-hgrv-626h)"},{"name":"VulnCheck Advisory: Kyverno before 1.19.2 Denial of Service via Nested Variable Substitution Loop","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/kyverno-before-1.19.2-denial-of-service-via-nested-variable-substitution-loop"}],"credits":[{"lang":"en","value":"1diot9","type":"finder"}],"x_generator":{"engine":"vulncheck-endgame"}}}}