CVE-2026-41185: medium-severity vulnerability in Tigera Calico
ServiceAccount token disclosure via Azure IPAM CNI plugin logs
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 6epss 0.3%
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.
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
Related CVEs — Tigera Calico
In the same product, most dangerous first.
CVE-2026-41186MEDIUMUnauthenticated Go pprof exposure in Calico debug serverEPSS 0.7%CVE-2022-28224MEDIUMCalico and Calico Enterprise may be vulnerable to route hijacking with the floating IP featureEPSS 0.6%CVE-2026-6540HIGHL7 policy bypass via unnormalized HTTP path matchingEPSS 0.5%CVE-2026-41184MEDIUMServiceAccount token disclosure via install-cni container logsEPSS 0.5%CVE-2026-41187MEDIUMCalico Tier Authorization Bypass via DeleteCollectionEPSS 0.4%CVE-2026-6720HIGHCalicoctl leaks cluster credentials to stderr when verbose logging is enabledEPSS 0.2%