CVE-2026-41184
ServiceAccount token disclosure via install-cni container logs
- State
- Published
- Severity
- 6.0 Medium
- Published
- May 28, 2026
- Updated
- May 28, 2026
- Reserved
- Apr 17, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.0 Medium | 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 | Tigera |
Weaknesses
- CWE-532 Insertion of sensitive information into log file
Affected Products
| Product | Versions |
|---|---|
CalicoTigera |
|
References
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