confluent-kafka: confluent-kafka: Information disclosure via improper TLS certificate validation in HashiCorp Vault integration

cve CVE-2026-15911 3 sources, 3 claims · Watch

Red Hat writes:
confluent-kafka: confluent-kafka: Information disclosure via improper TLS certificate validation in HashiCorp Vault integration the claim

What it is to other things

In words only, so not counted until a person confirms one:

affectsconfluent/confluent_kafka
NVD says “confluent · confluent-kafka”
made_byconfluent
NVD says “confluent”

What each source says

PropertySourceSaidMeans here
Cvss
cvss
GitHub advisories7.4
receipt
Source
GitHub advisories
Its words
7.4
Read by
field:cvss.score
Said since
2026-10-02 11:59 UTC
Last answered
2026-10-03 00:04 UTC
Original
open at the source
What the source handed over
{
  "credits": [],
  "cve_id": "CVE-2026-15911",
  "cvss": {
    "score": 7.4,
    "vector_string": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N"
  },
  "cvss_severities": {
    "cvss_v3": {
      "score": 7.4,
      "vector_string": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N"
    },
    "cvss_v4": {
      "score": 0.0,
      "vector_string": null
    }
  },
  "cwes": [
    {
      "cwe_id": "CWE-295",
      "name": "Improper 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.",
  "ghsa_id": "GHSA-r743-crv8-m3qr",
  "github_reviewed_at": null,
  "html_url": "https://github.com/advisories/GHSA-r743-crv8-m3qr",
  "identifiers": [
    {
      "type": "GHSA",
      "value": "GHSA-r743-crv8-m3qr"
    },
    {
      "type": "CVE",
      "value": "CVE-2026-15911"
    }
  ],
  "nvd_published_at": "2026-10-01T19:17:19Z",
  "published_at": "2026-10-01T21:32:50Z",
  "references": [
    "https://nvd.nist.gov/vuln/detail/CVE-2026-15911",
    "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",
    "https://github.com/advisories/GHSA-r743-crv8-m3qr"
  ],
  "repository_advisory_url": null,
  "severity": "high",
  "source_code_location": "",
  "summary": "Confluent Kafka Python client's HashiCorp Vault KMS integration could allow a remote attacker to...",
  "type": "unreviewed",
  "updated_at": "2026-10-01T21:33:03Z",
  "url": "https://api.github.com/advisories/GHSA-r743-crv8-m3qr",
  "vulnerabilities": [],
  "withdrawn_at": null
}
—
Cvss
cvss
NVD7.4
receipt
Source
NVD
Its words
7.4
Read by
field:cve.metrics.cvssMetricV31[].cvssData.baseScore
Said since
2026-10-02 12:00 UTC
Last answered
2026-10-03 00:06 UTC
Original
open at the source
What the source handed over
{
  "cve": {
    "affected": [
      {
        "affectedData": [
          {
            "cpes": [
              "cpe:2.3:a:confluent:confluent-kafka:*:*:*:*:*:*:*:*",
              "cpe:2.3:a:confluent:confluent-kafka:2.14.2:*:*:*:*:*:*:*"
            ],
            "defaultStatus": "unaffected",
            "product": "confluent-kafka",
            "vendor": "confluent",
            "versions": [
              {
                "lessThanOrEqual": "2.14.2",
                "status": "affected",
                "version": "0",
                "versionType": "semver"
              }
            ]
          }
        ],
        "source": "psirt@us.ibm.com"
      }
    ],
    "cveTags": [],
    "descriptions": [
      {
        "lang": "en",
        "value": "Confluent Kafka Python client's HashiCorp Vault KMS integration could allow a remote attacker to obtain sensitive information due to improper TLS certificate validation."
      }
    ],
    "id": "CVE-2026-15911",
    "lastModified": "2026-10-01T20:36:15.187",
    "metrics": {
      "cvssMetricV31": [
        {
          "cvssData": {
            "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"
          },
          "exploitabilityScore": 2.2,
          "impactScore": 5.2,
          "source": "psirt@us.ibm.com",
          "type": "Primary"
        }
      ]
    },
    "published": "2026-10-01T19:17:19.947",
    "references": [
      {
        "source": "psirt@us.ibm.com",
        "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"
      }
    ],
    "sourceIdentifier": "psirt@us.ibm.com",
    "vulnStatus": "Awaiting Analysis",
    "weaknesses": [
      {
        "description": [
          {
            "lang": "en",
            "value": "CWE-295"
          }
        ],
        "source": "psirt@us.ibm.com",
        "type": "Primary"
      }
    ]
  }
}
—
Cvss
cvss
Red Hat7.4
receipt
Source
Red Hat
Its words
7.4
Read by
field:cvss3_score
Said since
2026-10-02 18:04 UTC
Last answered
2026-10-03 00:06 UTC
Original
open at the source
What the source handed over
{
  "CVE": "CVE-2026-15911",
  "CWE": "CWE-295",
  "advisories": [],
  "affected_packages": [],
  "bugzilla": "2544809",
  "bugzilla_description": "confluent-kafka: confluent-kafka: Information disclosure via improper TLS certificate validation in HashiCorp Vault integration",
  "cvss3_score": "7.4",
  "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
  "cvss_score": null,
  "cvss_scoring_vector": null,
  "package_state": null,
  "public_date": "2026-10-01T18:29:42Z",
  "resource_url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-15911.json",
  "severity": "important"
}
—
Cwe
cwe
GitHub advisoriesCWE-295
receipt
Source
GitHub advisories
Its words
CWE-295
Read by
field:cwes[].cwe_id
Said since
2026-10-02 11:59 UTC
Last answered
2026-10-03 00:04 UTC
Original
open at the source
What the source handed over
{
  "credits": [],
  "cve_id": "CVE-2026-15911",
  "cvss": {
    "score": 7.4,
    "vector_string": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N"
  },
  "cvss_severities": {
    "cvss_v3": {
      "score": 7.4,
      "vector_string": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N"
    },
    "cvss_v4": {
      "score": 0.0,
      "vector_string": null
    }
  },
  "cwes": [
    {
      "cwe_id": "CWE-295",
      "name": "Improper 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.",
  "ghsa_id": "GHSA-r743-crv8-m3qr",
  "github_reviewed_at": null,
  "html_url": "https://github.com/advisories/GHSA-r743-crv8-m3qr",
  "identifiers": [
    {
      "type": "GHSA",
      "value": "GHSA-r743-crv8-m3qr"
    },
    {
      "type": "CVE",
      "value": "CVE-2026-15911"
    }
  ],
  "nvd_published_at": "2026-10-01T19:17:19Z",
  "published_at": "2026-10-01T21:32:50Z",
  "references": [
    "https://nvd.nist.gov/vuln/detail/CVE-2026-15911",
    "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",
    "https://github.com/advisories/GHSA-r743-crv8-m3qr"
  ],
  "repository_advisory_url": null,
  "severity": "high",
  "source_code_location": "",
  "summary": "Confluent Kafka Python client's HashiCorp Vault KMS integration could allow a remote attacker to...",
  "type": "unreviewed",
  "updated_at": "2026-10-01T21:33:03Z",
  "url": "https://api.github.com/advisories/GHSA-r743-crv8-m3qr",
  "vulnerabilities": [],
  "withdrawn_at": null
}
—
Cwe
cwe
Red HatCWE-295
receipt
Source
Red Hat
Its words
CWE-295
Read by
field:CWE
Said since
2026-10-02 18:04 UTC
Last answered
2026-10-03 00:06 UTC
Original
open at the source
What the source handed over
{
  "CVE": "CVE-2026-15911",
  "CWE": "CWE-295",
  "advisories": [],
  "affected_packages": [],
  "bugzilla": "2544809",
  "bugzilla_description": "confluent-kafka: confluent-kafka: Information disclosure via improper TLS certificate validation in HashiCorp Vault integration",
  "cvss3_score": "7.4",
  "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
  "cvss_score": null,
  "cvss_scoring_vector": null,
  "package_state": null,
  "public_date": "2026-10-01T18:29:42Z",
  "resource_url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-15911.json",
  "severity": "important"
}
—
Product
product
NVDconfluent-kafka
receipt
Source
NVD
Its words
confluent-kafka
Read by
field:cve.affected[].affectedData[].product
Said since
2026-10-02 12:00 UTC
Last answered
2026-10-03 00:06 UTC
Original
open at the source
What the source handed over
{
  "cve": {
    "affected": [
      {
        "affectedData": [
          {
            "cpes": [
              "cpe:2.3:a:confluent:confluent-kafka:*:*:*:*:*:*:*:*",
              "cpe:2.3:a:confluent:confluent-kafka:2.14.2:*:*:*:*:*:*:*"
            ],
            "defaultStatus": "unaffected",
            "product": "confluent-kafka",
            "vendor": "confluent",
            "versions": [
              {
                "lessThanOrEqual": "2.14.2",
                "status": "affected",
                "version": "0",
                "versionType": "semver"
              }
            ]
          }
        ],
        "source": "psirt@us.ibm.com"
      }
    ],
    "cveTags": [],
    "descriptions": [
      {
        "lang": "en",
        "value": "Confluent Kafka Python client's HashiCorp Vault KMS integration could allow a remote attacker to obtain sensitive information due to improper TLS certificate validation."
      }
    ],
    "id": "CVE-2026-15911",
    "lastModified": "2026-10-01T20:36:15.187",
    "metrics": {
      "cvssMetricV31": [
        {
          "cvssData": {
            "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"
          },
          "exploitabilityScore": 2.2,
          "impactScore": 5.2,
          "source": "psirt@us.ibm.com",
          "type": "Primary"
        }
      ]
    },
    "published": "2026-10-01T19:17:19.947",
    "references": [
      {
        "source": "psirt@us.ibm.com",
        "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"
      }
    ],
    "sourceIdentifier": "psirt@us.ibm.com",
    "vulnStatus": "Awaiting Analysis",
    "weaknesses": [
      {
        "description": [
          {
            "lang": "en",
            "value": "CWE-295"
          }
        ],
        "source": "psirt@us.ibm.com",
        "type": "Primary"
      }
    ]
  }
}
—
Severity
severity
GitHub advisorieshigh
From 7.0 to 8.9.
receipt
Source
GitHub advisories
Its words
high
Read by
field:severity
Said since
2026-10-02 11:59 UTC
Last answered
2026-10-03 00:04 UTC
Original
open at the source
What the source handed over
{
  "credits": [],
  "cve_id": "CVE-2026-15911",
  "cvss": {
    "score": 7.4,
    "vector_string": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N"
  },
  "cvss_severities": {
    "cvss_v3": {
      "score": 7.4,
      "vector_string": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N"
    },
    "cvss_v4": {
      "score": 0.0,
      "vector_string": null
    }
  },
  "cwes": [
    {
      "cwe_id": "CWE-295",
      "name": "Improper 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.",
  "ghsa_id": "GHSA-r743-crv8-m3qr",
  "github_reviewed_at": null,
  "html_url": "https://github.com/advisories/GHSA-r743-crv8-m3qr",
  "identifiers": [
    {
      "type": "GHSA",
      "value": "GHSA-r743-crv8-m3qr"
    },
    {
      "type": "CVE",
      "value": "CVE-2026-15911"
    }
  ],
  "nvd_published_at": "2026-10-01T19:17:19Z",
  "published_at": "2026-10-01T21:32:50Z",
  "references": [
    "https://nvd.nist.gov/vuln/detail/CVE-2026-15911",
    "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",
    "https://github.com/advisories/GHSA-r743-crv8-m3qr"
  ],
  "repository_advisory_url": null,
  "severity": "high",
  "source_code_location": "",
  "summary": "Confluent Kafka Python client's HashiCorp Vault KMS integration could allow a remote attacker to...",
  "type": "unreviewed",
  "updated_at": "2026-10-01T21:33:03Z",
  "url": "https://api.github.com/advisories/GHSA-r743-crv8-m3qr",
  "vulnerabilities": [],
  "withdrawn_at": null
}
—
Severity
severity
Red Hatimportant
A flaw that can easily compromise confidentiality, integrity or availability.
receipt
Source
Red Hat
Its words
important
Read by
field:severity
Said since
2026-10-02 18:04 UTC
Last answered
2026-10-03 00:06 UTC
Original
open at the source
What the source handed over
{
  "CVE": "CVE-2026-15911",
  "CWE": "CWE-295",
  "advisories": [],
  "affected_packages": [],
  "bugzilla": "2544809",
  "bugzilla_description": "confluent-kafka: confluent-kafka: Information disclosure via improper TLS certificate validation in HashiCorp Vault integration",
  "cvss3_score": "7.4",
  "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
  "cvss_score": null,
  "cvss_scoring_vector": null,
  "package_state": null,
  "public_date": "2026-10-01T18:29:42Z",
  "resource_url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-15911.json",
  "severity": "important"
}
high
Status
status
NVDAwaiting Analysis
receipt
Source
NVD
Its words
Awaiting Analysis
Read by
field:cve.vulnStatus
Said since
2026-10-02 12:00 UTC
Last answered
2026-10-03 00:06 UTC
Original
open at the source
What the source handed over
{
  "cve": {
    "affected": [
      {
        "affectedData": [
          {
            "cpes": [
              "cpe:2.3:a:confluent:confluent-kafka:*:*:*:*:*:*:*:*",
              "cpe:2.3:a:confluent:confluent-kafka:2.14.2:*:*:*:*:*:*:*"
            ],
            "defaultStatus": "unaffected",
            "product": "confluent-kafka",
            "vendor": "confluent",
            "versions": [
              {
                "lessThanOrEqual": "2.14.2",
                "status": "affected",
                "version": "0",
                "versionType": "semver"
              }
            ]
          }
        ],
        "source": "psirt@us.ibm.com"
      }
    ],
    "cveTags": [],
    "descriptions": [
      {
        "lang": "en",
        "value": "Confluent Kafka Python client's HashiCorp Vault KMS integration could allow a remote attacker to obtain sensitive information due to improper TLS certificate validation."
      }
    ],
    "id": "CVE-2026-15911",
    "lastModified": "2026-10-01T20:36:15.187",
    "metrics": {
      "cvssMetricV31": [
        {
          "cvssData": {
            "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"
          },
          "exploitabilityScore": 2.2,
          "impactScore": 5.2,
          "source": "psirt@us.ibm.com",
          "type": "Primary"
        }
      ]
    },
    "published": "2026-10-01T19:17:19.947",
    "references": [
      {
        "source": "psirt@us.ibm.com",
        "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"
      }
    ],
    "sourceIdentifier": "psirt@us.ibm.com",
    "vulnStatus": "Awaiting Analysis",
    "weaknesses": [
      {
        "description": [
          {
            "lang": "en",
            "value": "CWE-295"
          }
        ],
        "source": "psirt@us.ibm.com",
        "type": "Primary"
      }
    ]
  }
}
—
Vendor
vendor
NVDconfluent
receipt
Source
NVD
Its words
confluent
Read by
field:cve.affected[].affectedData[].vendor
Said since
2026-10-02 12:00 UTC
Last answered
2026-10-03 00:06 UTC
Original
open at the source
What the source handed over
{
  "cve": {
    "affected": [
      {
        "affectedData": [
          {
            "cpes": [
              "cpe:2.3:a:confluent:confluent-kafka:*:*:*:*:*:*:*:*",
              "cpe:2.3:a:confluent:confluent-kafka:2.14.2:*:*:*:*:*:*:*"
            ],
            "defaultStatus": "unaffected",
            "product": "confluent-kafka",
            "vendor": "confluent",
            "versions": [
              {
                "lessThanOrEqual": "2.14.2",
                "status": "affected",
                "version": "0",
                "versionType": "semver"
              }
            ]
          }
        ],
        "source": "psirt@us.ibm.com"
      }
    ],
    "cveTags": [],
    "descriptions": [
      {
        "lang": "en",
        "value": "Confluent Kafka Python client's HashiCorp Vault KMS integration could allow a remote attacker to obtain sensitive information due to improper TLS certificate validation."
      }
    ],
    "id": "CVE-2026-15911",
    "lastModified": "2026-10-01T20:36:15.187",
    "metrics": {
      "cvssMetricV31": [
        {
          "cvssData": {
            "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"
          },
          "exploitabilityScore": 2.2,
          "impactScore": 5.2,
          "source": "psirt@us.ibm.com",
          "type": "Primary"
        }
      ]
    },
    "published": "2026-10-01T19:17:19.947",
    "references": [
      {
        "source": "psirt@us.ibm.com",
        "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"
      }
    ],
    "sourceIdentifier": "psirt@us.ibm.com",
    "vulnStatus": "Awaiting Analysis",
    "weaknesses": [
      {
        "description": [
          {
            "lang": "en",
            "value": "CWE-295"
          }
        ],
        "source": "psirt@us.ibm.com",
        "type": "Primary"
      }
    ]
  }
}
—

vulnerability

confluent-kafka: confluent-kafka: Information disclosure via improper TLS certificate validation in HashiCorp Vault integration
zetlyn/cve-redhat · 2026-10-01
cvss 7.4 cwe CWE-295 severity important source
Confluent Kafka Python client's HashiCorp Vault KMS integration could allow a remote attacker to obtain sensitive information due to improper TLS certificate validation.
zetlyn/cve-nvd · 2026-10-01
cvss 7.4 product confluent-kafka status Awaiting Analysis vendor confluent source
Confluent Kafka Python client's HashiCorp Vault KMS integration could allow a remote attacker to...
zetlyn/cve-ghsa · 2026-10-01
cvss 7.4 cwe CWE-295 severity high source