CVE-2026-39961

描述

### Impact 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. ### Patches This vulnerability is resolved in version 0.37.0. We recommend all users update as soon as possible. ### Credits Credits to Andrés Cruciani for finding and reporting the bug through our [bug bounty program](https://bugcrowd.com/aiven-mbb-og)

如何修補 CVE-2026-39961

要修補 CVE-2026-39961,請將受影響套件升級到下列已修補版本。

• —升級至 0.37.0 或更新版本

CVE-2026-39961 正在被利用嗎?

低 — EPSS 為 0.0%,目前沒有觀察到大規模利用活動。

受影響套件(1)

• >= 0.31.0, < 0.37.0

CVSS 分數

參考連結(5)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2026-39961
• PATCHgithub.com/aiven/aiven-operator
• WEBgithub.com/aiven/aiven-operator/commit/032c9ba63257fdd2fddfb7f73f71830e371ff182
• WEBgithub.com/aiven/aiven-operator/releases/tag/v0.37.0