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TI-2026-23359 Aliases CVE-2026-29773GHSA-6r7f-3fwq-hq74

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

Priority LOW 19CWE-863Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
Low · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-863.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00217 12th percentileScored 2026-11-07
Fix Fixed kubewarden-controller (kubewarden): 1.33.0github.com/kubewarden/kubewarden-controller (Go): 1.33.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
kubewardenkubewarden-controllerbefore 1.33.01.33.0Patch availableCNA
—github.com/kubewarden/kubewarden-controller (Go)before 1.33.01.33.0Patch availableGHSA-6r7f-3fwq-hq74
  • kubewarden-controller Vendorkubewarden Affected before 1.33.0 Fixed in 1.33.0 Patch available CNA
  • github.com/kubewarden/kubewarden-controller (Go) Vendor— Affected before 1.33.0 Fixed in 1.33.0 Patch available GHSA-6r7f-3fwq-hq74

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:linuxfoundation:kubewarden:*:*:*:*:*:kubernetes:*:*1.6.0 to before 1.33.0Vulnerablebackstage
  • cpe:2.3:a:linuxfoundation:kubewarden:*:*:*:*:*:kubernetes:*:* Versions 1.6.0 to before 1.33.0 Vulnerable ·backstage

Remediation

  • Fix · CNA kubewarden-controller (kubewarden) Fixed in 1.33.0
  • Fix · GHSA-6r7f-3fwq-hq74 github.com/kubewarden/kubewarden-controller (Go) Fixed in 1.33.0 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-29773
  2. 2026-10-03 Alias added: GHSA-6r7f-3fwq-hq74

References

Patch 2

Advisory 2

Other 1

  • TI-2025-18119 The kubewarden-controller AdmissionPolicy and AdmissionPolicyGroup policies can be used to alter PolicyReport resources CVSS 3.1MEDIUM 6.5
  • TI-2026-83428 Case-sensitive registry check in Kubewarden trusted-repos-policy CVSS 3.1MEDIUM 6.3
  • TI-2025-18501 kubewarden-controller has an Information leak via AdmissionPolicyGroup Resource CVSS 3.1MEDIUM 4.3
  • TI-2026-30821 Kubewarden: RBAC Reconnaissance via unchecked can_i host capability call CVSS 3.1MEDIUM 4.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences