PT-2026-44417 · Tigera · Calico+2

Anthony Tam + 1 · Published 2026-05-28 · Updated 2026-05-28 · CVE-2026-6720

Mitre

CVSS v4.0

7.2

High

Base vector

AV:N/AC:L/AT:P/PR:L/UI:P/VC:H/VI:N/VA:N/SC:H/SI:H/SA:H

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.

Fix

Insertion into Log File

Weakness Enumeration

CWE-532

Related Identifiers

CVE-2026-6720

Affected Products

Calico

Calico Cloud

Calico Enterprise

References · 5

• https://github.com/projectcalico/calico/pull/12537 · Patch
• https://github.com/projectcalico/calico/pull/12535 · Patch
• https://github.com/projectcalico/calico/pull/12536 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-6720 · Security Note
• https://tigera.io/security-bulletins/tta-2026-003 · Vendor Advisory