{"cve":"CVE-2026-42541","nvd":{"published":"2026-05-12T18:17:24.957","modified":"2026-10-26T18:10:00.173","status":"Deferred","description":"Kubewarden is a policy engine for Kubernetes. Prior to , An attacker with privileged AdmissionPolicy or AdmissionPolicyGroup create permissions (which isn't the default) can craft a policy that makes use of the can_i host callback. The callback issues a SubjectAccessReview (SAR) requests to enumerate RBAC permissions of any user or service account across the cluster. can_i does not perform that check to enforce the context-aware allow-list and forwards the request directly to the callback handler, which executes a real SubjectAccessReview using policy-server privileges. This creates a policy-level authorization gap: can_i is effectively usable even when the policy has no context-aware resource grant. This is an information disclosure / reconnaissance issue, and not direct workload data exfiltration. The attacker learns permission information, such as whether specific service accounts can \"get secrets\", \"create pods\", or \"bind clusterroles\" in chosen namespaces. This vulnerability is fixed in .","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","score":4.3},"cwes":["CWE-862"],"references":["https://github.com/kubewarden/adm-controller/security/advisories/GHSA-wqcw-g35j-j578"],"products":[],"source":"nvd","synced_at":"2026-10-26T18:27:13.530666824+00:00"},"epss":{"cve":"CVE-2026-42541","score":0.00171,"percentile":0.06462,"date":"2026-10-26"},"kev":null,"osv":[{"id":"GHSA-wqcw-g35j-j578","url":"https://osv.dev/vulnerability/GHSA-wqcw-g35j-j578","summary":"Kubewarden vulnerable to RBAC Reconnaissance via unchecked can_i host capability call","modified":"2026-06-25T23:11:10.020551982Z","packages":[{"ecosystem":"Go","name":"github.com/kubewarden/kubewarden-controller","purl":"pkg:golang/github.com/kubewarden/kubewarden-controller","ranges":["<1.35.0"],"fixed":["1.35.0"]}]},{"id":"GO-2026-5716","url":"https://osv.dev/vulnerability/GO-2026-5716","summary":"Kubewarden vulnerable to RBAC Reconnaissance via unchecked can_i host capability call in github.com/kubewarden/kubewarden-controller","modified":"2026-06-25T23:01:42.659414931Z","packages":[{"ecosystem":"Go","name":"github.com/kubewarden/kubewarden-controller","purl":"pkg:golang/github.com/kubewarden/kubewarden-controller","ranges":["<1.35.0"],"fixed":["1.35.0"]}]}],"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."]}