{"id":"GHSA-99j8-wv67-4c72","revision":"432519d6da4c4461912e5b8c251172e0","records":[{"revision":"432519d6da4c4461912e5b8c251172e0","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GHSA-99j8-wv67-4c72","aliases":["CVE-2026-39961","GO-2026-5283"],"title":"Aiven Operator has cross-namespace secret exfiltration via ClickhouseUser connInfoSecretSource","description":"### Impact\nA 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.\n\nThe 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.\n\n### Patches\n\nThis vulnerability is resolved in version 0.37.0. We recommend all users update as soon as possible.\n\n### Credits\n\nCredits to Andrés Cruciani for finding and reporting the bug through our [bug bounty program](https://bugcrowd.com/aiven-mbb-og)","state":0,"publishedAt":"2026-04-10T17:22:00+00:00","modifiedAt":"2026-06-25T19:56:33.8826769+00:00","affected":[{"ecosystem":"Go","name":"github.com/aiven/aiven-operator","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0.31.0"},{"kind":"fixed","version":"0.37.0"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"MODERATE"}],"references":["https://github.com/aiven/aiven-operator/security/advisories/GHSA-99j8-wv67-4c72","https://nvd.nist.gov/vuln/detail/CVE-2026-39961","https://github.com/aiven/aiven-operator/commit/032c9ba63257fdd2fddfb7f73f71830e371ff182","https://github.com/aiven/aiven-operator","https://github.com/aiven/aiven-operator/releases/tag/v0.37.0"],"sourceUrl":"https://github.com/advisories/GHSA-99j8-wv67-4c72","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-99j8-wv67-4c72","identifiers":["GHSA-99j8-wv67-4c72","CVE-2026-39961","GO-2026-5283"]},"retained":false,"historicalAffected":[]}],"coverage":[]}