CVE-2026-41184
MEDIUMTigera Calico - ServiceAccount Token Disclosure via Install-Cni Container Logs
Title source: ruleDescription
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.
References (4)
Core 4
Core References
Vendor Advisory vendor-advisory
https://www.tigera.io/security-bulletins/tta-2026-001/
Scores
CVSS v3
6.5
EPSS
0.0050
EPSS Percentile
38.9%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-532
Status
published
Products (5)
tigera/calico
< 22.4.0
tigera/calico
< 3.21.7
Tigera/Calico
< 3.31.6
tigera/calico
< 3.32.0
Tigera/Calico
3.32.0
Published
May 28, 2026
Tracked Since
May 28, 2026