CVE-2026-33413
HighSummary
etcd to rozproszony magazyn klucz-wartość dla danych systemu rozproszonego. W wersjach przed 3.4.42, 3.5.28 i 3.6.9, nieautoryzowani użytkownicy mogą obejść kontrole uwierzytelniania lub autoryzacji i wywoływać określone funkcje etcd w klastrach, które udostępniają API gRPC nieufnym lub częściowo zaufanym klientom.
Risk Assessment
W niezałatanych klastrach etcd z włączonym uwierzytelnianiem, nieautoryzowani użytkownicy mogą uzyskać dostęp do informacji o topologii klastra oraz zakłócać operacje, co może prowadzić do przerwy w działaniu lub odmowy usługi.
Recommendation
Zaleca się aktualizację do wersji 3.4.42, 3.5.28 lub 3.6.9, aby załatać tę podatność. Dodatkowo, należy rozważyć wprowadzenie dodatkowych środków zabezpieczających dla klastrów etcd.
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Original NVD description (English source)
etcd is a distributed key-value store for the data of a distributed system. Prior to versions 3.4.42, 3.5.28, and 3.6.9, unauthorized users may bypass authentication or authorization checks and call certain etcd functions in clusters that expose the gRPC API to untrusted or partially trusted clients. In unpatched etcd clusters with etcd auth enabled, unauthorized users are able to call MemberList and learn cluster topology, including member IDs and advertised endpoints; call Alarm, which can be abused for operational disruption or denial of service; use Lease APIs, interfering with TTL-based keys and lease ownership; and/or trigger compaction, permanently removing historical revisions and disrupting watch, audit, and recovery workflows. Kubernetes does not rely on etcd’s built-in authentication and authorization. Instead, the API server handles authentication and authorization itself, so typical Kubernetes deployments are not affected. Versions 3.4.42, 3.5.28, and 3.6.9 contain a patch
Vulnerability data from NVD (NIST) · CISA KEV · EPSS