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{"affected": [{"affectedData": [{"product": "kyverno", "vendor": "kyverno", "versions": [{"status": "affected", "version": ">= 1.18.0, < 1.18.2"}]}], "source": "[email protected]"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Kyverno is a policy engine designed for cloud native platform engineering teams. From 1.18.0 until 1.18.2, the NamespacedMutatingPolicy CEL compiler exposes the generator library to matchConditions, allowing a namespace-scoped policy to invoke generator.apply(namespace, resources) with an arbitrary target namespace. The validation in pkg/cel/policies/mpol/validate.go checks that the policy compiles but does not enforce namespace scope, and GenerateResources in pkg/cel/libs/context.go does not reject the cross-namespace target. A user who can create NamespacedMutatingPolicy objects in one namespace can cause the admission controller, operating with cluster-wide privileges, to create ConfigMaps, NetworkPolicies, Secrets, RoleBindings, and other resources in another namespace, enabling unauthorized modification and potential privilege escalation. This issue is fixed in version 1.18.2."}], "id": "CVE-2026-54523", "lastModified": "2026-08-26T16:16:27.277", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 9.6, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 3.1, "impactScore": 5.8, "source": "[email protected]", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-54523", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-08-26T15:06:17.140283Z", "version": "2.0.3"}}]}, "published": "2026-08-26T15:16:48.910", "references": [{"source": "[email protected]", "url": "https://github.com/kyverno/kyverno/commit/0919553c0ea1904f8d891280c92018da97946a06"}, {"source": "[email protected]", "url": "https://github.com/kyverno/kyverno/commit/5164bcdeda5b57678bc2d7a03ecc2cbb02982dae"}, {"source": "[email protected]", "url": "https://github.com/kyverno/kyverno/pull/16238"}, {"source": "[email protected]", "url": "https://github.com/kyverno/kyverno/releases/tag/v1.18.2"}, {"source": "[email protected]", "url": "https://github.com/kyverno/kyverno/security/advisories/GHSA-79gf-7frw-68m9"}, {"source": "[email protected]", "url": "https://github.com/kyverno/sdk/commit/6573937441443e1ba5af9fbb28d5c0f20297f9df"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/kyverno/kyverno/security/advisories/GHSA-79gf-7frw-68m9"}], "sourceIdentifier": "[email protected]", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-862"}], "source": "[email protected]", "type": "Secondary"}]}

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