CVE-2026-41184
MediumCVSS 6.5Exploitation Probability (EPSS)
Low risk43th percentile - higher than 43% of all known CVEs
Summary
W Calico, kontener inicjalizacyjny install-cni loguje skonfigurowany CNI do standardowego wyjścia. Gdy szablon konfiguracji używa miejsca na token __SERVICEACCOUNT_TOKEN__, instalator podstawia aktywny token ServiceAccount, co naraża go na dostęp dla każdego uwierzytelnionego użytkownika z uprawnieniami do podglądania logów w przestrzeni nazw z calico-node.
Risk Assessment
Token ten posiada uprawnienia do modyfikacji statusu podów, co umożliwia przeprowadzenie ataków opartych na adnotacjach przeciwko obciążeniom klastra. Może to prowadzić do nieautoryzowanego dostępu i manipulacji w klastrze Kubernetes.
Recommendation
Zaleca się ograniczenie dostępu do logów kontenera install-cni oraz przegląd konfiguracji CNI, aby uniknąć ujawnienia tokenów ServiceAccount. Należy również monitorować uprawnienia użytkowników w przestrzeni nazw z calico-node.
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Original NVD description (English source)
In Calico, the install-cni init container logs the rendered CNI configuration to standard output. When the configuration template uses the __SERVICEACCOUNT_TOKEN__ placeholder (Canal/Flannel-Calico deployments), the installer substitutes the live Kubernetes ServiceAccount bearer token before logging, exposing the token to any authenticated user with pods/log permission in the namespace with calico-node. The token holds patch privileges on pods/status, enabling annotation-based attacks against cluster workloads. The default kubeconfig-based authentication path is not affected. This is a direct regression of TTA-2018-001.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

