CVE-2026-6720

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Source
https://cve.org/CVERecord?id=CVE-2026-6720
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-6720.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-6720
Aliases
Downstream
Related
Published
2026-05-28T15:47:42.519Z
Modified
2026-07-08T08:11:37.200563528Z
Severity
  • 7.2 (High) CVSS_V4 - 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 CVSS Calculator
Summary
Calicoctl leaks cluster credentials to stderr when verbose logging is enabled
Details

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.

Database specific 
{
    "cna_assigner": "Tigera",
    "cwe_ids": [
        "CWE-532"
    ],
    "unresolved_ranges": [
        {
            "extracted_events": [
                {
                    "fixed": "3.21.7"
                },
                {
                    "fixed": "22.4.0"
                }
            ],
            "source": "AFFECTED_FIELD"
        }
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/6xxx/CVE-2026-6720.json"
}
References

Affected packages

Git / github.com/projectcalico/calico

Affected ranges

Type
GIT
Repo
https://github.com/projectcalico/calico
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
eb1cf57823a1dd8d25c48b82fd023ea9e3e17996
Database specific 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "3.32.0"
        }
    ],
    "source": "AFFECTED_FIELD"
}

Affected versions

v2.*
v2.5.0
v2.5.0-calico
v2.5.0-rc2
v2.5.0-rc2-calico
v2.6.0
v2.6.0-calico
v2.6.0-rc1
v2.6.0-rc1-calico
v2.6.0-rc2
v2.6.0-rc2-calico
v2.6.2
v2.6.2-calico
v3.*
v3.0.0
v3.0.0-alpha1-rc1
v3.0.0-alpha1-rc1-calico
v3.0.0-calico
v3.0.1
v3.0.1-calico
v3.0.12
v3.0.12-calico
v3.1.7
v3.1.7-calico
v3.10.0
v3.10.0-calico
v3.10.2
v3.10.2-calico
v3.11.1
v3.11.1-calico
v3.16.0
v3.16.0-calico
v3.16.5
v3.16.5-calico
v3.17.5
v3.17.5-calico
v3.18.1
v3.18.1-calico
v3.18.5
v3.18.5-calico
v3.2.0
v3.2.0-calico
v3.2.8
v3.2.8-calico
v3.24.0-0.dev
v3.25.0-0.dev
v3.27.0-0.dev
v3.28.0-0.dev
v3.29.0-0.dev
v3.3.7
v3.3.7-calico
v3.30.0-0.dev
v3.31.0-0.dev
v3.32.0-0.dev
v3.8.5
v3.8.5-calico
v3.9.0
v3.9.0-calico
v3.9.4
v3.9.4-calico

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-6720.json"