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ServiceAccount token disclosure via Azure IPAM CNI plugin logs

CVSS 4.0 6.0 MEDIUMEUVD CVSS 4.0 6.0 CVSS 4.0 · [email protected] · Secondary 6.0 MEDIUMCVSS 3.1 · [email protected] · Primary 6.5 MEDIUMCVSS_V3 CVSS_V4 Publisher rating MODERATEFixed by github.com/projectcalico/calico 3.31.6Fixed by github.com/projectcalico/calico 1.11.0-cni-plugin.0.20260417001138-cd73bc2cea0fosv · severity unknownFixed by github.com/projectcalico/calico 1.11.0-cni-plugin.0.20260417001138-cd73bc2cea0fKEV status unknown

cve-program · CVE-2026-41185

Published

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.

Read the publisher's advisory

euvd · EUVD-2026-32933

Published

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.

Read the publisher's advisory

nvd · CVE-2026-41185

Published

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.

Read the publisher's advisory

osv · GHSA-m67g-87rx-v42c

Published

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.

Read the publisher's advisory

osv · GO-2026-5891

Published

Calico Inserts Sensitive Information into Log File in github.com/projectcalico/calico. NOTE: The source advisory for this report contains additional versions that could not be automatically mapped to standard Go module versions. (If this is causing false-positive reports from vulnerability scanners, please suggest an edit to the report.) The additional affected modules and versions are: github.com/projectcalico/calico/v3 before v3.31.6.

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Affected versions, risk and source history

Exploitation and risk

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Advisory history

14 saved versions

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15 Nov 2026 12:03:24 UTC

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 unma…

euvd · EUVD-2026-32933 · Published

13 Nov 2026 11:58:14 UTC

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 unma…

euvd · EUVD-2026-32933 · Published

11 Nov 2026 10:58:52 UTC

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 unma…

euvd · EUVD-2026-32933 · Published

9 Nov 2026 10:05:53 UTC

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 unma…

euvd · EUVD-2026-32933 · Published

7 Nov 2026 09:28:11 UTC

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 unma…

euvd · EUVD-2026-32933 · Published

5 Nov 2026 08:55:31 UTC

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 unma…

euvd · EUVD-2026-32933 · Published

3 Nov 2026 08:00:06 UTC

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 unma…

euvd · EUVD-2026-32933 · Published

1 Nov 2026 07:06:03 UTC

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 unma…

euvd · EUVD-2026-32933 · Published

30 Oct 2026 06:50:08 UTC

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 unma…

euvd · EUVD-2026-32933 · Published

28 Oct 2026 05:07:10 UTC

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 unma…

euvd · EUVD-2026-32933 · Published

25 Oct 2026 09:17:30 UTC

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 unma…

nvd · CVE-2026-41185 · Published

24 Oct 2026 13:19:41 UTC

Calico Inserts Sensitive Information into Log File in github.com/projectcalico/calico

osv · GO-2026-5891 · Published

23 Oct 2026 15:48:27 UTC

ServiceAccount token disclosure via Azure IPAM CNI plugin logs

cve-program · CVE-2026-41185 · Published

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Sources read 15 Nov 23:13 UTC · 274 of 275 readable · 250 fully read · 18 waiting for GitHub's hourly limit · documentation 461/469 current