{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-122311", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-11-04T23:25:07.315Z", "datePublished": "2026-11-05T02:25:13.645Z", "dateUpdated": "2026-11-05T02:25:13.645Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-11-05T02:25:13.645Z" }, "datePublic": "2026-10-21T00:00:00.000Z", "title": "Kyverno 1.16.0 before 1.19.2 Path Traversal in Namespaced CEL Policies via resource argument", "descriptions": [ { "lang": "en", "value": "Kyverno from 1.16.0 before 1.19.2 fails to validate path segments in the resource argument of resource.get() and resource.post(), allowing namespaced CEL policies to escape their namespace. Tenants who can create a NamespacedValidatingPolicy can insert .. segments to read and write arbitrary cluster objects using the admission controller's ServiceAccount, leading to cluster takeover." } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "description": "Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')", "cweId": "CWE-22", "type": "CWE" } ] } ], "affected": [ { "vendor": "kyverno", "product": "kyverno", "defaultStatus": "unaffected", "packageURL": "pkg:golang/github.com/kyverno/kyverno", "versions": [ { "version": "1.16.0", "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", "versionStartIncluding": "1.16.0" } ] } ] } ], "metrics": [ { "format": "CVSS", "cvssV4_0": { "version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "HIGH", "subIntegrityImpact": "HIGH", "subAvailabilityImpact": "HIGH", "baseScore": 9.4, "baseSeverity": "CRITICAL" } }, { "format": "CVSS", "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH", "baseScore": 9.9, "baseSeverity": "CRITICAL" } } ], "references": [ { "url": "https://github.com/kyverno/kyverno/security/advisories/GHSA-4pqm-wqq6-h9q2", "tags": [ "vendor-advisory" ], "name": "GitHub Security Advisory (GHSA-4pqm-wqq6-h9q2)" }, { "name": "VulnCheck Advisory: Kyverno 1.16.0 before 1.19.2 Path Traversal in Namespaced CEL Policies via resource argument", "tags": [ "third-party-advisory" ], "url": "https://www.vulncheck.com/advisories/kyverno-1.16.0-before-1.19.2-path-traversal-in-namespaced-cel-policies-via-resource-argument" } ], "credits": [ { "lang": "en", "value": "zer0d4y5", "type": "finder" } ], "x_generator": { "engine": "vulncheck-endgame" } } } }