{"cve":"CVE-2026-54523","nvd":{"published":"2026-08-26T15:16:48.910","modified":"2026-09-09T21:09:13.080","status":"Deferred","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N","score":9.6},"cwes":["CWE-862"],"references":["https://github.com/kyverno/kyverno/commit/0919553c0ea1904f8d891280c92018da97946a06","https://github.com/kyverno/kyverno/commit/5164bcdeda5b57678bc2d7a03ecc2cbb02982dae","https://github.com/kyverno/kyverno/pull/16238","https://github.com/kyverno/kyverno/releases/tag/v1.18.2","https://github.com/kyverno/kyverno/security/advisories/GHSA-79gf-7frw-68m9"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:50:17.453294893+00:00"},"epss":{"cve":"CVE-2026-54523","score":0.00466,"percentile":0.40365,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-79gf-7frw-68m9","url":"https://osv.dev/vulnerability/GHSA-79gf-7frw-68m9","summary":"Kyverno's NamespacedGeneratingPolicy generator.apply() namespace argument unvalidated -- background controller creates RoleBindings in any namespace including kube-system","modified":"2026-09-02T16:25:25.401393892Z","packages":[{"ecosystem":"Go","name":"github.com/kyverno/kyverno","purl":"pkg:golang/github.com/kyverno/kyverno","ranges":[">=1.18.0 <1.18.2"],"fixed":["1.18.2"]}]},{"id":"GO-2026-6296","url":"https://osv.dev/vulnerability/GO-2026-6296","summary":"Kyverno's NamespacedGeneratingPolicy generator.apply() namespace argument unvalidated -- background controller creates RoleBindings in any namespace including kube-system in github.com/kyverno/kyverno","modified":"2026-09-02T16:25:25.401393892Z","packages":[{"ecosystem":"Go","name":"github.com/kyverno/kyverno","purl":"pkg:golang/github.com/kyverno/kyverno","ranges":[">=1.18.0 <1.18.2"],"fixed":["1.18.2"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}