CVE-2026-6720 (GCVE-0-2026-6720)

Vulnerability from cvelistv5 – Published: 2026-05-28 15:47 – Updated: 2026-05-28 17:04
VLAI?
Title
Calicoctl leaks cluster credentials to stderr when verbose logging is enabled
Summary
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.
Severity ?
7.2 (High)
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:H/VI:N/VA:N/SC:H/SI:H/SA:H
CWE
Assigner
References
Impacted products
Vendor Product Version
Tigera Calico Affected: 0 , < 3.32.0 (semver)
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    Tigera Calico Enterprise Affected: 0 , < 3.21.7 (semver)
Unaffected: 3.22.3 (semver)
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    Tigera Calico Cloud Affected: 0 , < 22.4.0 (semver)
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Credits
Behnam Shobiri Behnam Shobiri Anthony Tam
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