CVE-2026-41184

MediumCVSS 6.5/10Last modified Oct 26, 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.

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Weakness enumeration

CWE-532

Affected software

Vendor	Product	Versions
Tigera	Calico	< 3.31.6

References

https://github.com/projectcalico/calico/pull/12502Issue Tracking, Patch
https://github.com/projectcalico/calico/pull/12526Issue Tracking, Patch
https://github.com/projectcalico/calico/pull/12527Issue Tracking, Patch
https://www.tigera.io/security-bulletins/tta-2026-001/Mitigation, Vendor Advisory

Timeline

Published: May 28, 2026
Last modified: Oct 26, 2026
NVD status: Analyzed

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