Medium severity6.5NVD Advisory· Published May 28, 2026· Updated Jun 5, 2026
CVE-2026-41184
CVE-2026-41184
Description
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.
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Affected products
5(expand)+ 1 more
- (no CPE)
- (no CPE)
Patches
Vulnerability mechanics
References
4- github.com/projectcalico/calico/pull/12502nvdIssue TrackingPatch
- github.com/projectcalico/calico/pull/12526nvdIssue TrackingPatch
- github.com/projectcalico/calico/pull/12527nvdIssue TrackingPatch
- www.tigera.io/security-bulletins/tta-2026-001/nvdMitigationVendor Advisory
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