{"cve":"CVE-2026-39961","nvd":{"published":"2026-04-09T18:17:02.053","modified":"2026-10-26T21:10:00.170","status":"Analyzed","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N","score":4.9},"cwes":["CWE-269","CWE-441"],"references":["https://github.com/aiven/aiven-operator/commit/032c9ba63257fdd2fddfb7f73f71830e371ff182","https://github.com/aiven/aiven-operator/releases/tag/v0.37.0","https://github.com/aiven/aiven-operator/security/advisories/GHSA-99j8-wv67-4c72"],"products":["aiven:aiven_operator"],"source":"nvd","synced_at":"2026-10-26T21:38:48.864438205+00:00"},"epss":{"cve":"CVE-2026-39961","score":0.00395,"percentile":0.33434,"date":"2026-10-26"},"kev":null,"osv":[{"id":"GHSA-99j8-wv67-4c72","url":"https://osv.dev/vulnerability/GHSA-99j8-wv67-4c72","summary":"Aiven Operator has cross-namespace secret exfiltration via ClickhouseUser connInfoSecretSource","modified":"2026-06-25T19:56:33.882676946Z","packages":[{"ecosystem":"Go","name":"github.com/aiven/aiven-operator","purl":"pkg:golang/github.com/aiven/aiven-operator","ranges":[">=0.31.0 <0.37.0"],"fixed":["0.37.0"]}]},{"id":"GO-2026-5283","url":"https://osv.dev/vulnerability/GO-2026-5283","summary":"Aiven Operator has cross-namespace secret exfiltration via ClickhouseUser connInfoSecretSource in github.com/aiven/aiven-operator","modified":"2026-06-25T19:45:24.906625530Z","packages":[{"ecosystem":"Go","name":"github.com/aiven/aiven-operator","purl":"pkg:golang/github.com/aiven/aiven-operator","ranges":[">=0.31.0 <0.37.0"],"fixed":["0.37.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}