CVE-2026-33558

{
  "id": "CVE-2026-33558",
  "sourceIdentifier": "[email protected]",
  "published": "2026-04-20T14:16:19.010",
  "lastModified": "2026-10-26T21:10:00.170",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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."
    },
    {
      "lang": "es",
      "value": "Se ha identificado una vulnerabilidad de exposición de información en Apache Kafka.\n\nEl componente NetworkClient registrará información completa de solicitudes y respuestas en el nivel de registro DEBUG en los registros. Por defecto, el nivel de registro está configurado en el nivel INFO. Si el nivel DEBUG está habilitado, la información sensible será expuesta a través del registro de salida de solicitudes y respuestas. Las listas completas de solicitudes y respuestas afectadas son:\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\nEste problema afecta a Apache Kafka: desde cualquier versión que soporte la API listada anteriormente hasta la v3.9.1, v4.0.0. Aconsejamos a los usuarios de Kafka que actualicen a la v3.9.2, v4.0.1, o posterior para evitar esta vulnerabilidad."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "Apache Software Foundation",
          "product": "Apache Kafka",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "0.11.0",
              "lessThanOrEqual": "3.9.1",
              "versionType": "semver",
              "status": "affected"
            },
            {
              "version": "4.0.0",
              "versionType": "semver",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Apache Software Foundation",
          "product": "Apache Kafka Clients",
          "defaultStatus": "unaffected",
          "collectionURL": "https://repo.maven.apache.org/maven2",
          "packageName": "org.apache.kafka:kafka-clients",
          "versions": [
            {
              "version": "0.11.0",
              "lessThanOrEqual": "3.9.1",
              "versionType": "semver",
              "status": "affected"
            },
            {
              "version": "4.0.0",
              "versionType": "semver",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 1.4
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-04-20T14:20:28.073658Z",
          "id": "CVE-2026-33558",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-533"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:apache:kafka:*:*:*:*:*:*:*:*",
              "versionStartIncluding": "0.11.0.0",
              "versionEndExcluding": "3.9.2",
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              "criteria": "cpe:2.3:a:apache:kafka:4.0.0:-:*:*:*:*:*:*",
              "matchCriteriaId": "2F2A086A-9ABC-4D24-8810-4C09363A795D"
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              "criteria": "cpe:2.3:a:apache:kafka:4.0.0:rc0:*:*:*:*:*:*",
              "matchCriteriaId": "0051B45F-653D-4B63-8433-5A549431D60A"
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              "criteria": "cpe:2.3:a:apache:kafka:4.0.0:rc1:*:*:*:*:*:*",
              "matchCriteriaId": "038C0B8B-A1D6-456C-B626-330A3E38D0DC"
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  ],
  "references": [
    {
      "url": "https://kafka.apache.org/cve-list",
      "source": "[email protected]",
      "tags": [
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://lists.apache.org/thread/pz5g4ky3h0k91tfd14p0dzqjp80960kl",
      "source": "[email protected]",
      "tags": [
        "Mitigation",
        "Vendor Advisory"
      ]
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2026/04/17/3",
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Mailing List"
      ]
    }
  ]
}