{"api_version":"1","generated_at":"2026-10-01T21:51:16+00:00","cve":"CVE-2026-15911","urls":{"html":"https://cve.report/CVE-2026-15911","api":"https://cve.report/api/cve/CVE-2026-15911.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-15911","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-15911"},"summary":{"title":"Confluent Kafka Python Improper TLS Certificate Validation","description":"Confluent Kafka Python client's HashiCorp Vault KMS integration could allow a remote attacker to obtain sensitive information due to improper TLS certificate validation.","state":"PUBLISHED","assigner":"ibm","published_at":"2026-10-01 19:17:19","updated_at":"2026-10-01 20:36:15"},"problem_types":["CWE-295","CWE-295 CWE-295 Improper certificate validation"],"metrics":[{"version":"3.1","source":"psirt@us.ibm.com","type":"Primary","score":"7.4","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","baseScore":7.4,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"NONE"}},{"version":"3.1","source":"CNA","type":"CVSS","score":"7.4","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","data":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.4,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","version":"3.1"}}],"references":[{"url":"https://support.confluent.io/hc/en-us/articles/54133146724244-CONFSA-2026-22-CVE-2026-15911-Confluent-Kafka-Python-Client-Vulnerability-TLS-Certificate-verification-disabled-by-default-in-HashiCorp-Vault-KMS-Integration","name":"https://support.confluent.io/hc/en-us/articles/54133146724244-CONFSA-2026-22-CVE-2026-15911-Confluent-Kafka-Python-Client-Vulnerability-TLS-Certificate-verification-disabled-by-default-in-HashiCorp-Vault-KMS-Integration","refsource":"psirt@us.ibm.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-15911","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-15911","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"confluent","product":"confluent-kafka","version":"affected 2.14.2 semver","platforms":[]}],"timeline":[],"solutions":[{"source":"CNA","title":"","value":"*  confluent-kafka (Python): This issue has been addressed in confluent-kafka (Python) 2.15.0, which:  *  Enables TLS certificate verification by default.\n  *  Exposes configuration to supply a custom CA bundle and an optional client certificate for mutual TLS, through both driver configuration and standard Vault environment variables:  *  ssl.ca.location (or environment variable VAULT_CACERT): CA bundle used to verify the Vault server certificate.\n  *  ssl.certificate.location (or environment variable VAULT_CLIENT_CERT): client certificate for mutual TLS.\n  *  ssl.key.location (or environment variable VAULT_CLIENT_KEY): client private key for mutual TLS.\n\n\n\n  *  An empty or unset CA value keeps verification enabled; it does not silently disable verification.\n\n\n\n  *  Confluent Platform: Not affected. 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The vulnerability resides in the confluent-kafka Python client library and does not affect Confluent Platform server components or their released versions.</li><li><strong>Confluent Cloud:</strong> Not affected. No remediation is required for Confluent Cloud.</li></ul>"}],"value":"*  confluent-kafka (Python): This issue has been addressed in confluent-kafka (Python) 2.15.0, which:  *  Enables TLS certificate verification by default.\n  *  Exposes configuration to supply a custom CA bundle and an optional client certificate for mutual TLS, through both driver configuration and standard Vault environment variables:  *  ssl.ca.location (or environment variable VAULT_CACERT): CA bundle used to verify the Vault server certificate.\n  *  ssl.certificate.location (or environment variable VAULT_CLIENT_CERT): client certificate for mutual TLS.\n  *  ssl.key.location (or environment variable VAULT_CLIENT_KEY): client private key for mutual TLS.\n\n\n\n  *  An empty or unset CA value keeps verification enabled; it does not silently disable verification.\n\n\n\n  *  Confluent Platform: Not affected. The vulnerability resides in the confluent-kafka Python client library and does not affect Confluent Platform server components or their released versions.\n  *  Confluent Cloud: Not affected. No remediation is required for Confluent Cloud."}],"source":{"discovery":"UNKNOWN"},"title":"Confluent Kafka Python Improper TLS Certificate Validation","x_generator":{"engine":"Vulnogram 1.0.5"}}},"cveMetadata":{"assignerOrgId":"9a959283-ebb5-44b6-b705-dcc2bbced522","assignerShortName":"ibm","cveId":"CVE-2026-15911","datePublished":"2026-10-01T18:29:42.297Z","dateReserved":"2026-07-15T19:28:12.162Z","dateUpdated":"2026-10-01T18:29:42.297Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-10-01 19:17:19","lastModifiedDate":"2026-10-01 20:36:15","problem_types":["CWE-295","CWE-295 CWE-295 Improper certificate validation"],"metrics":{"cvssMetricV31":[{"source":"psirt@us.ibm.com","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","baseScore":7.4,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"NONE"},"exploitabilityScore":2.2,"impactScore":5.2}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"15911","Ordinal":"1","Title":"Confluent Kafka Python Improper TLS Certificate Validation","CVE":"CVE-2026-15911","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"15911","Ordinal":"1","NoteData":"Confluent Kafka Python client's HashiCorp Vault KMS integration could allow a remote attacker to obtain sensitive information due to improper TLS certificate validation.","Type":"Description","Title":"Confluent Kafka Python Improper TLS Certificate Validation"}]}}}