Tigera Calico/Calico Enterprise/Calico Cloud prior 3.32.0 Configuration log file

Summaryinfo

A vulnerability categorized as problematic has been discovered in Tigera Calico, Calico Enterprise and Calico Cloud. Impacted is an unknown function of the component Configuration Handler. The manipulation results in log file. This vulnerability is reported as CVE-2026-6720. The attack can be launched remotely. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in Tigera Calico, Calico Enterprise and Calico Cloud. Affected is an unknown functionality of the component Configuration Handler. The manipulation with an unknown input leads to a log file vulnerability. CWE is classifying the issue as CWE-532. Information written to log files can be of a sensitive nature and give valuable guidance to an attacker or expose sensitive user information. This is going to have an impact on confidentiality. CVE summarizes:

When calicoctl is invoked with --log-level=info or --log-level=debug, the client prints the full contents of its loaded connection-configuration struct to stderr in a single log line. The struct embeds every credential calicoctl uses to talk to the cluster — inline kubeconfig (with bearer token), Kubernetes API bearer token, etcd password, and inline PEM-encoded etcd client certificate and key. Any reader of that stderr stream — CI job logs, session-recording archives, shared support-ticket transcripts, or local filesystem viewers on the host that ran calicoctl — can extract these credentials with zero Kubernetes privilege. calicoctl's default log level is panic, so this issue only triggers when verbose logging is explicitly enabled.

The weakness was disclosed by Behnam Shobiri. The advisory is available at github.com. This vulnerability is traded as CVE-2026-6720 since 04/20/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1592 by the MITRE ATT&CK project.

Upgrading to version 3.32.0 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Type

• Cloud Software

Vendor

• Tigera

Name

• Calico
• Calico Cloud
• Calico Enterprise

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