Skip to content
Heist/ feed
Back to feed
Medium

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

Type: advisorySources: OSV

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.

Products
Not specified
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2026-29773
Confirmed fixed CVEs
Not specified
Updated in this feed
3 Nov 2026, 18:27 UTC · Revision 1

Source evidence

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

core-osv · Original source

Published 9 Mar 2026, 22:23 UTC

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.

osv:CVE-2026-29773
Complete source record
{
  "id": "01ebc8a5e49183575da30154c5e94aaa9b7f16c1bb4f11030f3fa08e83986f1d",
  "url": "https://osv.dev/vulnerability/CVE-2026-29773",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "kubewarden-controller cross-namespace data exfiltration via deprecated host callback binding",
    "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.",
    "evidence": "osv:CVE-2026-29773",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-29773",
      "aliases": [
        "CVE-2026-29773",
        "GHSA-6r7f-3fwq-hq74",
        "GO-2026-4652"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/kubewarden/adm-controller",
              "type": "GIT",
              "events": [
                {
                  "introduced": "f57f2725989088d74d062b4a2dada2bd1a907706"
                },
                {
                  "fixed": "1b4ef28e45172e277c8e62b0c8ea84e4b244408c"
                },
                {
                  "fixed": "4e41b60ae44902d82d94101bac93fb77cae65651"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:linuxfoundation:kubewarden:*:*:*:*:*:kubernetes:*:*",
                    "range": [
                      {
                        "introduced": "1.6.0"
                      },
                      {
                        "fixed": "1.33.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "4e41b60ae44902d82d94101bac93fb77cae65651"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.32.1",
            "v1.32.0",
            "v1.32.0-rc5",
            "v1.32.0-rc4",
            "v1.32.0-rc3",
            "v1.32.0-rc2",
            "v1.32.0-rc1",
            "v1.31.0",
            "v1.31.0-rc1",
            "v1.30.0-rc2",
            "v1.30.0",
            "v1.30.0-rc1",
            "v1.29.0",
            "v1.29.0-rc3",
            "v1.29.0-rc2",
            "v1.29.0-rc1",
            "v1.28.0",
            "v1.28.0-rc1",
            "v1.27.0-rc1",
            "v1.27.0",
            "v1.26.0",
            "v1.26.0-rc1",
            "v1.25.0-rc1",
            "v1.25.0",
            "v1.24.0-rc3",
            "v1.24.0",
            "v1.24.0-rc1",
            "v1.23.0",
            "v1.23.0-rc1",
            "v1.23.0-beta2",
            "v1.23.0-beta1",
            "v1.22.0-rc1",
            "v1.22.0",
            "v1.21.0-rc2",
            "v1.21.0",
            "v1.21.0-rc1",
            "v1.20.1",
            "v1.20.0",
            "v1.20.0-rc1",
            "v1.19.0",
            "v1.19.0-rc1",
            "v1.19.0-beta1",
            "v1.18.0",
            "v1.18.0-rc1",
            "v1.18.0-beta1",
            "v1.17.1",
            "v1.17.0",
            "v1.17.0-rc4",
            "v1.17.0-rc3",
            "v1.17.0-rc2",
            "v1.17.0-rc1",
            "v1.16.0-rc2",
            "v1.16.0",
            "v1.15.1",
            "v1.15.0-rc3",
            "v1.15.0",
            "v1.15.0-rc2",
            "v1.14.0-rc2",
            "v1.14.0",
            "v1.14.0-rc1",
            "v1.13.0",
            "v1.13.0-rc2",
            "v1.13.0-rc1",
            "v1.12.0",
            "v1.12.0-rc2",
            "v1.12.0-rc1",
            "v1.11.0",
            "v1.11.0-rc6",
            "v1.11.0-rc5",
            "v1.11.0-rc4",
            "v1.11.0-rc3",
            "v1.11.0-rc2",
            "v1.11.0-rc1",
            "v1.10.1",
            "v1.10.0-rc2",
            "v1.10.0",
            "v1.10.0-rc1",
            "v1.9.0-rc3",
            "v1.9.0",
            "v1.9.0-rc2",
            "v1.9.0-rc1",
            "v1.8.2",
            "v1.8.1",
            "v1.8.0-rc2",
            "v1.8.0",
            "v1.8.0-rc1",
            "v1.7.1",
            "v1.7.0-rc3",
            "v1.7.0",
            "v1.7.0-rc2",
            "v1.7.0-rc1",
            "v1.6.2",
            "v1.6.1",
            "v1.6.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-29773.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:31.779625986Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/29xxx/CVE-2026-29773.json",
        "https://github.com/kubewarden/kubewarden-controller/security/advisories/GHSA-6r7f-3fwq-hq74",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-29773",
        "https://github.com/kubewarden/kubewarden-controller/commit/4e41b60ae44902d82d94101bac93fb77cae65651",
        "https://github.com/kubewarden/kubewarden-controller/pull/1519"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-863"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/29xxx/CVE-2026-29773.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-29773",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 498432,
  "published_at": "2026-03-09T22:23:57.793+00:00"
}