CVE-2026-41184: Tigera Calico

Medium severity, CVSS 6.5. EPSS: 0.5% chance of exploitation in the next 30 days.

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.

Affected products

• Tigera Calico: before 3.21.7 (fixed in 3.21.7); before 3.32.0 (fixed in 3.32.0); before 22.4.0 (fixed in 22.4.0); from 3.22.0, before 3.22.3 (fixed in 3.22.3)

Published 2026-05-28. Last modified 2026-06-17.