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Vulnerability · Published Mar 9, 2026 · Assigned by GitHub_M

CVE-2026-29773kubewarden-controller cross-namespace data exfiltration via deprecated host callback binding

Medium 4.3

In plain English

A medium-severity incorrect authorization in kubewarden-controller from kubewarden. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 12% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)4.3Medium
Exploit odds (30 days)0.2%top 87.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Gogithub.com/kubewarden/kubewarden-controller1.33.0GHSA-6r7f-3fwq-hq74
Gogithub.com/kubewarden/kubewarden-controller1.33.0GO-2026-4652

Affected products (as reported)

VendorProductVersions
kubewarden kubewarden-controller < 1.33.0

Weakness: CWE-863 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

References