When Calico is configured with the Azure IPAM plugin, the Calico CNI binary mutates the incoming CNI configuration to attach subnet information before delegating to the IPAM plugin. After mutating, the Azure IPAM helper logs the entire unmarshaled configuration map (stdinData) at INFO level to /var/log/calico/cni/cni.log on every CNI ADD and DEL invocation — once per pod scheduled or terminated on the node. When the cluster is deployed using token-based Kubernetes authentication, this log entry contains the ServiceAccount token, client key, and certificate authority in plaintext. Any principal with read access to /var/log/calico/cni/cni.log on a node  can read these logs and extract the credentials, which grant cluster-wide Calico networking admin privileges.
History

Thu, 28 May 2026 17:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 28 May 2026 17:00:00 +0000

Type Values Removed Values Added
Description When Calico is configured with the Azure IPAM plugin, the Calico CNI binary mutates the incoming CNI configuration to attach subnet information before delegating to the IPAM plugin. After mutating, the Azure IPAM helper logs the entire unmarshaled configuration map (stdinData) at INFO level to /var/log/calico/cni/cni.log on every CNI ADD and DEL invocation — once per pod scheduled or terminated on the node. When the cluster is deployed using token-based Kubernetes authentication, this log entry contains the ServiceAccount token, client key, and certificate authority in plaintext. Any principal with read access to /var/log/calico/cni/cni.log on a node  can read these logs and extract the credentials, which grant cluster-wide Calico networking admin privileges.
Title ServiceAccount token disclosure via Azure IPAM CNI plugin logs
First Time appeared Tigera
Tigera calico
Tigera calico Cloud
Tigera calico Enterprise
Weaknesses CWE-532
CPEs cpe:2.3:a:tigera:calico:*:*:*:*:*:*:*:*
cpe:2.3:a:tigera:calico_cloud:*:*:*:*:*:*:*:*
cpe:2.3:a:tigera:calico_enterprise:*:*:*:*:*:*:*:*
Vendors & Products Tigera
Tigera calico
Tigera calico Cloud
Tigera calico Enterprise
References
Metrics cvssV4_0

{'score': 6, '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'}


cve-icon MITRE

Status: PUBLISHED

Assigner: Tigera

Published:

Updated: 2026-05-28T17:03:54.074Z

Reserved: 2026-04-17T17:41:35.905Z

Link: CVE-2026-41185

cve-icon Vulnrichment

Updated: 2026-05-28T17:03:51.092Z

cve-icon NVD

Status : Received

Published: 2026-05-28T17:16:22.670

Modified: 2026-05-28T17:16:22.670

Link: CVE-2026-41185

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-28T18:30:23Z