CVE-2026-41184 PUBLISHED

ServiceAccount token disclosure via install-cni container logs

Assigner: Tigera
Reserved: 17.04.2026 Published: 28.05.2026 Updated: 28.05.2026

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.

Metrics

CVSS Vector: 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
CVSS Score: 6

Product Status

Vendor Tigera
Product Calico
Versions Default: affected
  • Version 3.32.0 is unaffected
  • affected from 0 to 3.31.6 (excl.)

Credits

  • Behnam Shobiri finder
  • Behnam Shobiri remediation developer
  • Anthony Tam remediation reviewer
  • Matt Dupre remediation reviewer
  • Casey Davenport remediation verifier

References

Problem Types

  • CWE-532 Insertion of sensitive information into log file CWE

Impacts

  • CAPEC-150 Collect Data from Common Resource Locations