{"id":"CVE-2026-39961","revision":"1307c57208464b4b91e4df93f0691170","records":[{"revision":"1307c57208464b4b91e4df93f0691170","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-39961","aliases":[],"title":"Aiven Operator has cross-namespace secret exfiltration via ClickhouseUser connInfoSecretSource","description":"Aiven Operator allows you to provision and manage Aiven Services from your Kubernetes cluster. From 0.31.0 to before 0.37.0, a developer with create permission on ClickhouseUser CRDs in their own namespace can exfiltrate secrets from any other namespace — production database credentials, API keys, service tokens — with a single kubectl apply. The operator reads the victim's secret using its ClusterRole and writes the password into a new secret in the attacker's namespace. The operator acts as a confused deputy: its ServiceAccount has cluster-wide secret read/write (aiven-operator-role ClusterRole), and it trusts user-supplied namespace values in spec.connInfoSecretSource.namespace without validation. No admission webhook enforces this boundary — the ServiceUser webhook returns nil, and no ClickhouseUser webhook exists. This vulnerability is fixed in 0.37.0.","state":0,"publishedAt":"2026-04-09T17:14:07.33+00:00","modifiedAt":"2026-04-10T14:08:22.087+00:00","affected":[{"ecosystem":"Vendor product","name":"aiven-operator","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"aiven\",\n                    \"product\": \"aiven-operator\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 0.37.0\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N","score":6.8,"severity":"MEDIUM"}],"references":["https://github.com/aiven/aiven-operator/security/advisories/GHSA-99j8-wv67-4c72","https://github.com/aiven/aiven-operator/commit/032c9ba63257fdd2fddfb7f73f71830e371ff182","https://github.com/aiven/aiven-operator/releases/tag/v0.37.0"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-39961","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-39961","identifiers":["CVE-2026-39961"]},"retained":false,"historicalAffected":[]}],"coverage":[]}