{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-122306","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","state":"PUBLISHED","assignerShortName":"VulnCheck","dateReserved":"2026-11-04T23:23:51.290Z","datePublished":"2026-11-05T02:25:10.219Z","dateUpdated":"2026-11-05T02:25:10.219Z"},"containers":{"cna":{"providerMetadata":{"orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","shortName":"VulnCheck","dateUpdated":"2026-11-05T02:25:10.219Z"},"datePublic":"2026-10-21T00:00:00.000Z","title":"Kyverno before 1.19.2 Denial of Service via Exponential-Time Wildcard Matching","descriptions":[{"lang":"en","value":"Kyverno before 1.19.2 contains a denial of service vulnerability that allows namespaced policy authors to exhaust admission controller CPU by submitting pathological wildcard patterns. Attackers can create a Policy with crafted match and exclude names evaluated by ValidateMatchExcludeConflict, pinning cores and causing cluster-wide webhook timeouts that block resource operations."}],"problemTypes":[{"descriptions":[{"lang":"en","description":"Inefficient Algorithmic Complexity","cweId":"CWE-407","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-8mrj-27wr-599g","tags":["vendor-advisory"],"name":"GitHub Security Advisory (GHSA-8mrj-27wr-599g)"},{"name":"VulnCheck Advisory: Kyverno before 1.19.2 Denial of Service via Exponential-Time Wildcard Matching","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/kyverno-before-1.19.2-denial-of-service-via-exponential-time-wildcard-matching"}],"credits":[{"lang":"en","value":"1diot9","type":"finder"}],"x_generator":{"engine":"vulncheck-endgame"}}}}