Kubewarden is a policy engine for Kubernetes. Kubewarden cluster operators can grant permissions to users to deploy namespaced AdmissionPolicies and AdmissionPolicyGroups in their Namespaces. One of Kubewarden promises is that configured users can deploy namespaced policies in a safe manner, without privilege escalation. An attacker with privileged "AdmissionPolicy" create permissions (which isn't the default) could make use of 3 deprecated host-callback APIs: kubernetes/ingresses, kubernetes/namespaces, kubernetes/services. The attacker can craft a policy that exercises these deprecated API calls and would allow them read access to Ingresses, Namespaces, and Services resources respectively. This attack is read-only, there is no write capability and no access to Secrets, ConfigMaps, or other resource types beyond these three.
History

Tue, 10 Mar 2026 15:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 10 Mar 2026 14:15:00 +0000

Type Values Removed Values Added
First Time appeared Kubewarden
Kubewarden kubewarden-controller
Vendors & Products Kubewarden
Kubewarden kubewarden-controller

Mon, 09 Mar 2026 22:45:00 +0000

Type Values Removed Values Added
Description Kubewarden is a policy engine for Kubernetes. Kubewarden cluster operators can grant permissions to users to deploy namespaced AdmissionPolicies and AdmissionPolicyGroups in their Namespaces. One of Kubewarden promises is that configured users can deploy namespaced policies in a safe manner, without privilege escalation. An attacker with privileged "AdmissionPolicy" create permissions (which isn't the default) could make use of 3 deprecated host-callback APIs: kubernetes/ingresses, kubernetes/namespaces, kubernetes/services. The attacker can craft a policy that exercises these deprecated API calls and would allow them read access to Ingresses, Namespaces, and Services resources respectively. This attack is read-only, there is no write capability and no access to Secrets, ConfigMaps, or other resource types beyond these three.
Title kubewarden-controller cross-namespace data exfiltration via deprecated host callback binding
Weaknesses CWE-863
References
Metrics cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-03-09T22:23:57.793Z

Updated: 2026-03-10T14:31:47.680Z

Reserved: 2026-03-04T16:26:02.897Z

Link: CVE-2026-29773

cve-icon Vulnrichment

Updated: 2026-03-10T14:31:43.891Z

cve-icon NVD

Status : Received

Published: 2026-03-10T17:39:03.210

Modified: 2026-03-10T17:39:03.210

Link: CVE-2026-29773

cve-icon Redhat

No data.