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.
Update github.com/projectcalico/calico to 3.31.6; github.com/projectcalico/calico to 1.11.0-cni-plugin.0.20260417001138-cd73bc2cea0f if you use the affected versions. Test the change in a non-production environment first.
Local check
hol-guard supply-chain scanCalico Inserts Sensitive Information into Log File affects github.com/projectcalico/calico (go), github.com/projectcalico/calico (go). Severity is medium. 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.
AI coding agents often install or upgrade packages automatically in go. A medium vulnerability in a dependency can be pulled into a project through a normal install or update without a human reviewing the change, expanding the blast radius from a single package to every agent workspace that depends on it.
| Package | Affected range |
|---|
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.
Update github.com/projectcalico/calico to 3.31.6; github.com/projectcalico/calico to 1.11.0-cni-plugin.0.20260417001138-cd73bc2cea0f if you use the affected versions. Test the change in a non-production environment first.
Local check
hol-guard supply-chain scanCalico Inserts Sensitive Information into Log File affects github.com/projectcalico/calico (go), github.com/projectcalico/calico (go). Severity is medium. 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.
AI coding agents often install or upgrade packages automatically in go. A medium vulnerability in a dependency can be pulled into a project through a normal install or update without a human reviewing the change, expanding the blast radius from a single package to every agent workspace that depends on it.
| Package | Affected range |
|---|
| Fixed version |
|---|
| github.com/projectcalico/calicogo | >=2.0.0,<3.31.6 | 3.31.6 |
|---|---|---|
| github.com/projectcalico/calicogo | <1.11.0-cni-plugin.0.20260417001138-cd73bc2cea0f | 1.11.0-cni-plugin.0.20260417001138-cd73bc2cea0f |
Fixed versions are reported by the source feed; confirm compatibility before updating.
Reported by GitHub Security Advisories (ghsa).
HOL Guard can help your team review package activity against supported protection paths.
Explore HOL Guard| Fixed version |
|---|
| github.com/projectcalico/calicogo | >=2.0.0,<3.31.6 | 3.31.6 |
|---|---|---|
| github.com/projectcalico/calicogo | <1.11.0-cni-plugin.0.20260417001138-cd73bc2cea0f | 1.11.0-cni-plugin.0.20260417001138-cd73bc2cea0f |
Fixed versions are reported by the source feed; confirm compatibility before updating.
Reported by GitHub Security Advisories (ghsa).
HOL Guard can help your team review package activity against supported protection paths.
Explore HOL Guard