{"api_version":"1","generated_at":"2026-05-29T16:24:05+00:00","cve":"CVE-2026-6720","urls":{"html":"https://cve.report/CVE-2026-6720","api":"https://cve.report/api/cve/CVE-2026-6720.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-6720","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-6720"},"summary":{"title":"Calicoctl leaks cluster credentials to stderr when verbose logging is enabled","description":"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.","state":"PUBLISHED","assigner":"Tigera","published_at":"2026-05-28 17:16:33","updated_at":"2026-05-29 15:39:34"},"problem_types":["CWE-532","CWE-532 CWE-532"],"metrics":[{"version":"4.0","source":"psirt@tigera.io","type":"Secondary","score":"7.2","severity":"HIGH","vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","data":{"version":"4.0","vectorString":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","baseScore":7.2,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"LOW","userInteraction":"PASSIVE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"HIGH","subIntegrityImpact":"HIGH","subAvailabilityImpact":"HIGH","exploitMaturity":"NOT_DEFINED","confidentialityRequirement":"NOT_DEFINED","integrityRequirement":"NOT_DEFINED","availabilityRequirement":"NOT_DEFINED","modifiedAttackVector":"NOT_DEFINED","modifiedAttackComplexity":"NOT_DEFINED","modifiedAttackRequirements":"NOT_DEFINED","modifiedPrivilegesRequired":"NOT_DEFINED","modifiedUserInteraction":"NOT_DEFINED","modifiedVulnConfidentialityImpact":"NOT_DEFINED","modifiedVulnIntegrityImpact":"NOT_DEFINED","modifiedVulnAvailabilityImpact":"NOT_DEFINED","modifiedSubConfidentialityImpact":"NOT_DEFINED","modifiedSubIntegrityImpact":"NOT_DEFINED","modifiedSubAvailabilityImpact":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED"}},{"version":"4.0","source":"CNA","type":"CVSS","score":"7.2","severity":"HIGH","vector":"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","data":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":7.2,"baseSeverity":"HIGH","exploitMaturity":"NOT_DEFINED","privilegesRequired":"LOW","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"HIGH","subConfidentialityImpact":"HIGH","subIntegrityImpact":"HIGH","userInteraction":"PASSIVE","valueDensity":"NOT_DEFINED","vectorString":"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","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"NONE","vulnerabilityResponseEffort":"NOT_DEFINED"}}],"references":[{"url":"https://www.tigera.io/security-bulletins/tta-2026-003/","name":"https://www.tigera.io/security-bulletins/tta-2026-003/","refsource":"psirt@tigera.io","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/projectcalico/calico/pull/12536","name":"https://github.com/projectcalico/calico/pull/12536","refsource":"psirt@tigera.io","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/projectcalico/calico/pull/12537","name":"https://github.com/projectcalico/calico/pull/12537","refsource":"psirt@tigera.io","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/projectcalico/calico/pull/12535","name":"https://github.com/projectcalico/calico/pull/12535","refsource":"psirt@tigera.io","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-6720","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-6720","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Tigera","product":"Calico","version":"affected 3.32.0 semver","platforms":[]},{"source":"CNA","vendor":"Tigera","product":"Calico Enterprise","version":"affected 3.21.7 semver","platforms":[]},{"source":"CNA","vendor":"Tigera","product":"Calico Enterprise","version":"unaffected 3.22.3 semver","platforms":[]},{"source":"CNA","vendor":"Tigera","product":"Calico Cloud","version":"affected 22.4.0 semver","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[{"source":"CNA","value":"Behnam Shobiri","lang":"en"},{"source":"CNA","value":"Behnam Shobiri","lang":"en"},{"source":"CNA","value":"Anthony Tam","lang":"en"}],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"adp":[{"metrics":[{"other":{"content":{"id":"CVE-2026-6720","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","timestamp":"2026-05-28T17:04:05.727153Z","version":"2.0.3"},"type":"ssvc"}}],"providerMetadata":{"dateUpdated":"2026-05-28T17:04:11.659Z","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP"},"title":"CISA ADP Vulnrichment"}],"cna":{"affected":[{"defaultStatus":"affected","product":"Calico","vendor":"Tigera","versions":[{"lessThan":"3.32.0","status":"affected","version":"0","versionType":"semver"}]},{"defaultStatus":"affected","product":"Calico Enterprise","vendor":"Tigera","versions":[{"lessThan":"3.21.7","status":"affected","version":"0","versionType":"semver"},{"status":"unaffected","version":"3.22.3","versionType":"semver"}]},{"defaultStatus":"affected","product":"Calico Cloud","vendor":"Tigera","versions":[{"lessThan":"22.4.0","status":"affected","version":"0","versionType":"semver"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:a:tigera:calico:*:*:*:*:*:*:*:*","versionEndExcluding":"3.32.0","versionStartIncluding":"0","vulnerable":true}],"negate":false,"operator":"OR"},{"cpeMatch":[{"criteria":"cpe:2.3:a:tigera:calico_enterprise:*:*:*:*:*:*:*:*","versionEndExcluding":"3.21.7","versionStartIncluding":"0","vulnerable":true},{"criteria":"cpe:2.3:a:tigera:calico_enterprise:3.22.3:*:*:*:*:*:*:*","vulnerable":false}],"negate":false,"operator":"OR"},{"cpeMatch":[{"criteria":"cpe:2.3:a:tigera:calico_cloud:*:*:*:*:*:*:*:*","versionEndExcluding":"22.4.0","versionStartIncluding":"0","vulnerable":true}],"negate":false,"operator":"OR"}],"operator":"OR"}],"credits":[{"lang":"en","type":"finder","value":"Behnam Shobiri"},{"lang":"en","type":"remediation developer","value":"Behnam Shobiri"},{"lang":"en","type":"remediation verifier","value":"Anthony Tam"}],"datePublic":"2026-05-28T16:00:00.000Z","descriptions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"<span>When </span><span>calicoctl</span><span> is invoked with </span><span>--log-level=info</span><span> or </span><span>--log-level=debug</span><span>, the client prints the full contents of its loaded connection-configuration struct to stderr in a single log line. The struct embeds every credential </span><span>calicoctl</span><span> 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 </span><span>calicoctl</span><span> — can extract these credentials with zero Kubernetes privilege. </span><span>calicoctl</span><span>'s default log level is </span><span>panic</span><span>, so this issue only triggers when verbose logging is explicitly enabled.</span>"}],"value":"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."}],"impacts":[{"capecId":"CAPEC-150","descriptions":[{"lang":"en","value":"CAPEC-150 Collect Data from Common Resource Locations"}]}],"metrics":[{"cvssV4_0":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":7.2,"baseSeverity":"HIGH","exploitMaturity":"NOT_DEFINED","privilegesRequired":"LOW","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"HIGH","subConfidentialityImpact":"HIGH","subIntegrityImpact":"HIGH","userInteraction":"PASSIVE","valueDensity":"NOT_DEFINED","vectorString":"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","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"NONE","vulnerabilityResponseEffort":"NOT_DEFINED"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-532","description":"CWE-532","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-05-28T15:47:42.519Z","orgId":"e6d453f4-3dae-4941-bcea-9af25f4e824d","shortName":"Tigera"},"references":[{"tags":["patch"],"url":"https://github.com/projectcalico/calico/pull/12535"},{"tags":["patch"],"url":"https://github.com/projectcalico/calico/pull/12536"},{"tags":["patch"],"url":"https://github.com/projectcalico/calico/pull/12537"},{"tags":["vendor-advisory"],"url":"https://www.tigera.io/security-bulletins/tta-2026-003/"}],"source":{"discovery":"UNKNOWN"},"title":"Calicoctl leaks cluster credentials to stderr when verbose logging is enabled","x_generator":{"engine":"Vulnogram 1.0.2"}}},"cveMetadata":{"assignerOrgId":"e6d453f4-3dae-4941-bcea-9af25f4e824d","assignerShortName":"Tigera","cveId":"CVE-2026-6720","datePublished":"2026-05-28T15:47:42.519Z","dateReserved":"2026-04-20T19:31:31.065Z","dateUpdated":"2026-05-28T17:04:11.659Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-05-28 17:16:33","lastModifiedDate":"2026-05-29 15:39:34","problem_types":["CWE-532","CWE-532 CWE-532"],"metrics":{"cvssMetricV40":[{"source":"psirt@tigera.io","type":"Secondary","cvssData":{"version":"4.0","vectorString":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","baseScore":7.2,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"LOW","userInteraction":"PASSIVE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"HIGH","subIntegrityImpact":"HIGH","subAvailabilityImpact":"HIGH","exploitMaturity":"NOT_DEFINED","confidentialityRequirement":"NOT_DEFINED","integrityRequirement":"NOT_DEFINED","availabilityRequirement":"NOT_DEFINED","modifiedAttackVector":"NOT_DEFINED","modifiedAttackComplexity":"NOT_DEFINED","modifiedAttackRequirements":"NOT_DEFINED","modifiedPrivilegesRequired":"NOT_DEFINED","modifiedUserInteraction":"NOT_DEFINED","modifiedVulnConfidentialityImpact":"NOT_DEFINED","modifiedVulnIntegrityImpact":"NOT_DEFINED","modifiedVulnAvailabilityImpact":"NOT_DEFINED","modifiedSubConfidentialityImpact":"NOT_DEFINED","modifiedSubIntegrityImpact":"NOT_DEFINED","modifiedSubAvailabilityImpact":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED"}}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"6720","Ordinal":"1","Title":"Calicoctl leaks cluster credentials to stderr when verbose loggi","CVE":"CVE-2026-6720","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"6720","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"Calicoctl leaks cluster credentials to stderr when verbose loggi"}]}}}