EUVD-2026-32931
GHSA-9p7w-w5q6-mxj3
CVSS VectorNVD
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:L/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
3DescriptionNVD
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.
AnalysisAI
Calico's install-cni init container leaks live Kubernetes ServiceAccount bearer tokens into pod logs when Canal/Flannel-Calico deployments use the __SERVICEACCOUNT_TOKEN__ placeholder, making the credential readable by any authenticated user with pods/log permission in the calico-node namespace. The exposed token carries patch privileges on pods/status, creating a lateral movement path via annotation-based attacks against cluster workloads. …
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External POC / Exploit Code
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