Vulnerability-Lookup

Vulnerability from bitnami_vulndb

Published

2026-04-22 08:40

Modified

2026-04-22 09:10

Summary

Apache Kafka, Apache Kafka Clients: Information Exposure Through Network Client Log Output

Details

Information exposure vulnerability has been identified in Apache Kafka.

The NetworkClient component will output entire requests and responses information in the DEBUG log level in the logs. By default, the log level is set to INFO level. If the DEBUG level is enabled, the sensitive information will be exposed via the requests and responses output log. The entire lists of impacted requests and responses are:

AlterConfigsRequest
AlterUserScramCredentialsRequest
ExpireDelegationTokenRequest
IncrementalAlterConfigsRequest
RenewDelegationTokenRequest
SaslAuthenticateRequest
createDelegationTokenResponse
describeDelegationTokenResponse
SaslAuthenticateResponse

This issue affects Apache Kafka: from any version supported the listed API above through v3.9.1, v4.0.0. We advise the Kafka users to upgrade to v3.9.2, v4.0.1, or later to avoid this vulnerability.

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "kafka",
        "purl": "pkg:bitnami/kafka"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.11.0"
            },
            {
              "fixed": "3.9.2"
            },
            {
              "introduced": "4.0.0"
            },
            {
              "fixed": "4.0.1"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
          "type": "CVSS_V3"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-33558"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:apache:kafka:*:*:*:*:*:maven:*:*"
    ],
    "severity": "Medium"
  },
  "details": "Information exposure vulnerability has been identified in Apache Kafka.\n\nThe NetworkClient component will output entire requests and responses information in the DEBUG log level in the logs. By default, the log level is set to INFO level. If the DEBUG level is enabled, the sensitive information will be exposed via the requests and responses output log. The entire lists of impacted requests and responses are:\n\n\n  *  AlterConfigsRequest\n\n  *  AlterUserScramCredentialsRequest\n\n  *  ExpireDelegationTokenRequest\n\n  *  IncrementalAlterConfigsRequest\n\n  *  RenewDelegationTokenRequest\n\n  *  SaslAuthenticateRequest\n\n  *  createDelegationTokenResponse\n\n  *  describeDelegationTokenResponse\n\n  *  SaslAuthenticateResponse\n\n\nThis issue affects Apache Kafka: from any version supported the listed API above through v3.9.1, v4.0.0. We advise the Kafka users to upgrade to v3.9.2, v4.0.1, or later to avoid this vulnerability.",
  "id": "BIT-kafka-2026-33558",
  "modified": "2026-04-22T09:10:06.651Z",
  "published": "2026-04-22T08:40:42.095Z",
  "references": [
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2026/04/17/3"
    },
    {
      "type": "WEB",
      "url": "https://kafka.apache.org/cve-list"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread/pz5g4ky3h0k91tfd14p0dzqjp80960kl"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33558"
    }
  ],
  "schema_version": "1.6.2",
  "summary": "Apache Kafka, Apache Kafka Clients: Information Exposure Through Network Client Log Output"
}

CVE-2026-33558 (GCVE-0-2026-33558)

Vulnerability from cvelistv5 – Published: 2026-04-20 13:20 – Updated: 2026-04-20 14:20

Title

Apache Kafka, Apache Kafka Clients: Information Exposure Through Network Client Log Output

Summary

Information exposure vulnerability has been identified in Apache Kafka. The NetworkClient component will output entire requests and responses information in the DEBUG log level in the logs. By default, the log level is set to INFO level. If the DEBUG level is enabled, the sensitive information will be exposed via the requests and responses output log. The entire lists of impacted requests and responses are: * AlterConfigsRequest * AlterUserScramCredentialsRequest * ExpireDelegationTokenRequest * IncrementalAlterConfigsRequest * RenewDelegationTokenRequest * SaslAuthenticateRequest * createDelegationTokenResponse * describeDelegationTokenResponse * SaslAuthenticateResponse This issue affects Apache Kafka: from any version supported the listed API above through v3.9.1, v4.0.0. We advise the Kafka users to upgrade to v3.9.2, v4.0.1, or later to avoid this vulnerability.

Severity ?

No CVSS data available.

CWE

CWE-533 - DEPRECATED: Information Exposure Through Server Log Files

Assigner

apache

References

URL

Tags

	https://kafka.apache.org/cve-list	vendor-advisory
	https://lists.apache.org/thread/pz5g4ky3h0k91tfd1…	mailing-list

Impacted products

Vendor

Product

Version

Apache Software Foundation

Apache Kafka

Affected: 0.11.0 , ≤ 3.9.1 (semver)
Affected: 4.0.0 (semver)

Apache Software Foundation

Apache Kafka Clients

Affected: 0.11.0 , ≤ 3.9.1 (semver)
Affected: 4.0.0 (semver)

Credits

Alyssa Huang <ahuang@confluent.io> Luke Chen <showuon@gmail.com>

Show details on NVD website

JSON

To clipboard

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              "confidentialityImpact": "LOW",
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              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
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              "content": {
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                "options": [
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                  },
                  {
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                  },
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                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-20T14:20:28.073658Z",
                "version": "2.0.3"
              },
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        ],
        "providerMetadata": {
          "dateUpdated": "2026-04-20T14:20:41.640Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
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              "version": "0.11.0",
              "versionType": "semver"
            },
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              "version": "4.0.0",
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        },
        {
          "collectionURL": "https://repo.maven.apache.org/maven2",
          "defaultStatus": "unaffected",
          "packageName": "org.apache.kafka:kafka-clients",
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          "vendor": "Apache Software Foundation",
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}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

Vulnerability from bitnami_vulndb

CVE-2026-33558 (GCVE-0-2026-33558)

Tags

Sightings

Nomenclature