{ "document": { "category": "csaf_base", "csaf_version": "2.0", "distribution": { "tlp": { "label": "WHITE" } }, "lang": "en", "notes": [ { "category": "legal_disclaimer", "text": "The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this portal to enhance access to its information and vulnerabilities. The use of this information is subject to the following terms and conditions:\n\nThe vulnerabilities disclosed in this portal are gathered by NCSC-NL from a variety of open sources, which the user can retrieve from other platforms. NCSC-NL makes every reasonable effort to ensure that the content of this portal is kept up to date, and that it is accurate and complete. Nevertheless, NCSC-NL cannot entirely rule out the possibility of errors, and therefore cannot give any warranty in respect of its completeness, accuracy or real-time keeping up-to-date. NCSC-NL does not control nor guarantee the accuracy, relevance, timeliness or completeness of information obtained from these external sources. The vulnerabilities disclosed in this portal are intended solely for the convenience of professional parties to take appropriate measures to manage the risks posed to the cybersecurity. No rights can be derived from the information provided therein.\n\nNCSC-NL and the Kingdom of the Netherlands assume no legal liability or responsibility for any damage resulting from either the use or inability of use of the vulnerabilities disclosed in this portal. This includes damage resulting from the inaccuracy of incompleteness of the information contained in it.\nThe information on this page is subject to Dutch law. All disputes related to or arising from the use of this portal regarding the disclosure of vulnerabilities will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings." } ], "publisher": { "category": "coordinator", "contact_details": "cert@ncsc.nl", "name": "National Cyber Security Centre", "namespace": "https://www.ncsc.nl/" }, "title": "CVE-2026-33557", "tracking": { "current_release_date": "2026-07-22T15:23:17.815169Z", "generator": { "date": "2026-02-17T15:00:00Z", "engine": { "name": "V.E.L.M.A", "version": "1.7" } }, "id": "CVE-2026-33557", "initial_release_date": "2026-04-17T11:35:48.764713Z", "revision_history": [ { "date": "2026-04-17T11:35:48.764713Z", "number": "1", "summary": "NCSC Score created." }, { "date": "2026-04-17T12:05:49.799477Z", "number": "2", "summary": "Source created.| CVE status created. (valid)| Products created (1).| Products connected (3).| References created (5)." }, { "date": "2026-04-17T12:06:00.165419Z", "number": "3", "summary": "NCSC Score updated." }, { "date": "2026-04-20T14:52:55.777011Z", "number": "4", "summary": "Source created.| CVE status created. (valid)| Description created for source.| Products created (1).| References created (3).| CWES updated (1)." }, { "date": "2026-04-20T14:53:04.771300Z", "number": "5", "summary": "NCSC Score updated." }, { "date": "2026-04-20T16:15:07.409788Z", "number": "6", "summary": "CVSS created.| Unknown change." }, { "date": "2026-04-20T16:15:12.178723Z", "number": "7", "summary": "NCSC Score updated." }, { "date": "2026-04-20T20:50:10.706442Z", "number": "8", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (3).| CWES updated (1)." }, { "date": "2026-04-20T20:50:13.803776Z", "number": "9", "summary": "NCSC Score updated." }, { "date": "2026-04-21T16:02:25.749923Z", "number": "10", "summary": "Source connected.| CVE status created. (valid)| EPSS created." }, { "date": "2026-04-21T16:02:32.585179Z", "number": "11", "summary": "NCSC Score updated." }, { "date": "2026-04-21T22:19:05.052664Z", "number": "12", "summary": "Source created.| CVE status created. (valid)| Description created for source.| Products created (4).| Product Identifiers created (3).| References created (2)." }, { "date": "2026-04-21T22:19:14.291671Z", "number": "13", "summary": "NCSC Score updated." }, { "date": "2026-04-22T14:29:55.186609Z", "number": "14", "summary": "Products created (1).| Product Identifiers created (1)." }, { "date": "2026-04-22T14:30:03.415513Z", "number": "15", "summary": "NCSC Score updated." }, { "date": "2026-04-22T18:09:06.343378Z", "number": "16", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products created (1).| References created (4)." }, { "date": "2026-04-24T15:40:47.239962Z", "number": "17", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (6).| CWES updated (1)." }, { "date": "2026-04-24T15:40:50.536340Z", "number": "18", "summary": "NCSC Score updated." }, { "date": "2026-04-24T18:20:23.731150Z", "number": "19", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products created (3).| Product Identifiers created (2).| References created (5).| CWES updated (1)." }, { "date": "2026-04-24T18:20:26.704804Z", "number": "20", "summary": "NCSC Score updated." }, { "date": "2026-04-26T15:51:15.305321Z", "number": "21", "summary": "EPSS updated." }, { "date": "2026-04-26T15:51:21.497887Z", "number": "22", "summary": "NCSC Score updated." }, { "date": "2026-05-20T18:48:03.585399Z", "number": "23", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products created (1).| References created (5).| CWES updated (1)." }, { "date": "2026-05-20T18:48:07.477186Z", "number": "24", "summary": "NCSC Score updated." }, { "date": "2026-05-28T15:48:44.599078Z", "number": "25", "summary": "Source connected.| CVE status created. (valid)| EPSS created." }, { "date": "2026-05-28T15:48:46.460677Z", "number": "26", "summary": "NCSC Score updated." }, { "date": "2026-05-29T09:05:56.569935Z", "number": "27", "summary": "Source connected.| CVE status created. (valid)| Products connected (1).| References created (3)." }, { "date": "2026-05-29T09:05:59.005561Z", "number": "28", "summary": "NCSC Score updated." }, { "date": "2026-06-02T12:25:58.361025Z", "number": "29", "summary": "Source connected.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (1).| Product Remediations created (1).| References created (2)." }, { "date": "2026-06-02T12:26:00.758695Z", "number": "30", "summary": "NCSC Score updated." }, { "date": "2026-06-03T18:52:12.896177Z", "number": "31", "summary": "Source connected.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (1).| Product Remediations created (1).| References created (2)." }, { "date": "2026-06-03T18:52:14.703299Z", "number": "32", "summary": "NCSC Score updated." }, { "date": "2026-06-15T15:05:18.125923Z", "number": "33", "summary": "EPSS updated." }, { "date": "2026-06-15T15:05:20.236892Z", "number": "34", "summary": "NCSC Score updated." }, { "date": "2026-06-30T03:53:44.079014Z", "number": "35", "summary": "References created (3).| CWES updated (1)." }, { "date": "2026-06-30T03:53:46.312451Z", "number": "36", "summary": "NCSC Score updated." }, { "date": "2026-06-30T03:54:16.910438Z", "number": "37", "summary": "References created (3).| CWES updated (1)." }, { "date": "2026-07-06T12:08:30.231114Z", "number": "38", "summary": "References created (3)." }, { "date": "2026-07-06T12:08:31.990406Z", "number": "39", "summary": "NCSC Score updated." }, { "date": "2026-07-13T09:14:38.530922Z", "number": "40", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products created (4).| Products connected (1).| References created (8).| CWES updated (1)." }, { "date": "2026-07-22T10:25:32.763882Z", "number": "41", "summary": "Source connected.| CVE status created. (valid)| Products connected (5).| References created (3)." }, { "date": "2026-07-22T10:25:45.543395Z", "number": "42", "summary": "NCSC Score updated." }, { "date": "2026-07-22T10:52:44.531177Z", "number": "43", "summary": "Source connected.| CVE status created. (valid)| Products connected (8).| References created (3)." }, { "date": "2026-07-22T12:57:17.525129Z", "number": "44", "summary": "Source connected.| CVE status created. (valid)| Products connected (5).| References created (3)." }, { "date": "2026-07-22T12:58:35.288560Z", "number": "45", "summary": "NCSC Score updated." }, { "date": "2026-07-22T12:58:57.608697Z", "number": "46", "summary": "Source connected.| CVE status created. (valid)| Products connected (1).| References created (3)." }, { "date": "2026-07-22T13:12:24.023586Z", "number": "47", "summary": "Source connected.| CVE status created. (valid)| Products connected (1).| References created (3)." }, { "date": "2026-07-22T13:13:24.454552Z", "number": "48", "summary": "NCSC Score updated." }, { "date": "2026-07-22T14:01:53.671545Z", "number": "49", "summary": "Source connected.| CVE status created. (valid)" }, { "date": "2026-07-22T14:04:28.229261Z", "number": "50", "summary": "Source connected.| CVE status created. (valid)" }, { "date": "2026-07-22T15:22:47.139128Z", "number": "51", "summary": "Source connected.| CVE status created. (valid)" } ], "status": "interim", "version": "51" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:semver/4.1.0|<=4.1.1", "product": { "name": "vers:semver/4.1.0|<=4.1.1", "product_id": "CSAFPID-6174846" } } ], "category": "product_name", "name": "Apache Kafka" } ], "category": "vendor", "name": "Apache Software Foundation" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/unified assurance 6.1.1-7.0.0", "product": { "name": "vers:unknown/unified assurance 6.1.1-7.0.0", "product_id": "CSAFPID-7942221", "product_identification_helper": { "cpe": "cpe:/a:oracle:communications:unified_assurance_6.1.1_-_7.0.0" } } } ], "category": "product_name", "name": "Communications" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/21.12.0.0-21.12.21.8", "product": { "name": "vers:unknown/21.12.0.0-21.12.21.8", "product_id": "CSAFPID-8879360", "product_identification_helper": { "cpe": "cpe:/a:oracle:construction_and_engineering:21.12.0.0_-_21.12.21.8" } } }, { "category": "product_version_range", "name": "vers:unknown/22.12.0.0-22.12.21.2", "product": { "name": "vers:unknown/22.12.0.0-22.12.21.2", "product_id": "CSAFPID-8879358", "product_identification_helper": { "cpe": "cpe:/a:oracle:construction_and_engineering:22.12.0.0_-_22.12.21.2" } } }, { "category": "product_version_range", "name": "vers:unknown/23.12.0-23.12.19", "product": { "name": "vers:unknown/23.12.0-23.12.19", "product_id": "CSAFPID-8879361", "product_identification_helper": { "cpe": "cpe:/a:oracle:construction_and_engineering:23.12.0-23.12.19" } } }, { "category": "product_version_range", "name": "vers:unknown/24.12.0-24.12.14", "product": { "name": "vers:unknown/24.12.0-24.12.14", "product_id": "CSAFPID-8879357", "product_identification_helper": { "cpe": "cpe:/a:oracle:construction_and_engineering:24.12.0-24.12.14" } } }, { "category": "product_version_range", "name": "vers:unknown/25.12.0-25.12.6", "product": { "name": "vers:unknown/25.12.0-25.12.6", "product_id": "CSAFPID-8879359", "product_identification_helper": { "cpe": "cpe:/a:oracle:construction_and_engineering:25.12.0-25.12.6" } } } ], "category": "product_name", "name": "Construction and Engineering" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/14.5.0-14.8.0", "product": { "name": "vers:unknown/14.5.0-14.8.0", "product_id": "CSAFPID-8878809", "product_identification_helper": { "cpe": "cpe:/a:oracle:financial_services_applications:14.5.0-14.8.0" } } }, { "category": "product_version_range", "name": "vers:unknown/8.0.7.9.0", "product": { "name": "vers:unknown/8.0.7.9.0", "product_id": "CSAFPID-8878805", "product_identification_helper": { "cpe": "cpe:/a:oracle:financial_services_applications:8.0.7.9.0" } } }, { "category": "product_version_range", "name": "vers:unknown/8.0.8.7.0", "product": { "name": "vers:unknown/8.0.8.7.0", "product_id": "CSAFPID-8878806", "product_identification_helper": { "cpe": "cpe:/a:oracle:financial_services_applications:8.0.8.7.0" } } }, { "category": "product_version_range", "name": "vers:unknown/8.1.2.5.0", "product": { "name": "vers:unknown/8.1.2.5.0", "product_id": "CSAFPID-8878807", "product_identification_helper": { "cpe": "cpe:/a:oracle:financial_services_applications:8.1.2.5.0" } } }, { "category": "product_version_range", "name": "vers:unknown/8.1.2.7", "product": { "name": "vers:unknown/8.1.2.7", "product_id": "CSAFPID-1847004", "product_identification_helper": { "cpe": "cpe:/a:oracle:financial_services_applications:8.1.2.7" } } }, { "category": "product_version_range", "name": "vers:unknown/8.1.2.9", "product": { "name": "vers:unknown/8.1.2.9", "product_id": "CSAFPID-2726519", "product_identification_helper": { "cpe": "cpe:/a:oracle:financial_services_applications:8.1.2.9" } } }, { "category": "product_version_range", "name": "vers:unknown/8.1.3.0", "product": { "name": "vers:unknown/8.1.3.0", "product_id": "CSAFPID-1847007", "product_identification_helper": { "cpe": "cpe:/a:oracle:financial_services_applications:8.1.3.0" } } }, { "category": "product_version_range", "name": "vers:unknown/8.1.3.1", "product": { "name": "vers:unknown/8.1.3.1", "product_id": "CSAFPID-8878808", "product_identification_helper": { "cpe": "cpe:/a:oracle:financial_services_applications:8.1.3.1" } } } ], "category": "product_name", "name": "Financial Services Applications" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/12.2.1.4.0", "product": { "name": "vers:unknown/12.2.1.4.0", "product_id": "CSAFPID-1549107", "product_identification_helper": { "cpe": "cpe:/a:oracle:fusion_middleware:12.2.1.4.0" } } }, { "category": "product_version_range", "name": "vers:unknown/14.1.1.0.0", "product": { "name": "vers:unknown/14.1.1.0.0", "product_id": "CSAFPID-1549109", "product_identification_helper": { "cpe": "cpe:/a:oracle:fusion_middleware:14.1.1.0.0" } } }, { "category": "product_version_range", "name": "vers:unknown/14.1.2.0.0", "product": { "name": "vers:unknown/14.1.2.0.0", "product_id": "CSAFPID-1847010", "product_identification_helper": { "cpe": "cpe:/a:oracle:fusion_middleware:14.1.2.0.0" } } }, { "category": "product_version_range", "name": "vers:unknown/14.1.2.1.0", "product": { "name": "vers:unknown/14.1.2.1.0", "product_id": "CSAFPID-5129879", "product_identification_helper": { "cpe": "cpe:/a:oracle:fusion_middleware:14.1.2.1.0" } } }, { "category": "product_version_range", "name": "vers:unknown/15.1.1.0.0", "product": { "name": "vers:unknown/15.1.1.0.0", "product_id": "CSAFPID-5452508", "product_identification_helper": { "cpe": "cpe:/a:oracle:fusion_middleware:15.1.1.0.0" } } } ], "category": "product_name", "name": "Fusion Middleware" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/unknown", "product": { "name": "vers:unknown/unknown", "product_id": "CSAFPID-8879362", "product_identification_helper": { "cpe": "cpe:/a:oracle:communications:-" } } } ], "category": "product_name", "name": "Oracle Communications" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:oracle/>=6.1.1|<=7.0.0", "product": { "name": "vers:oracle/>=6.1.1|<=7.0.0", "product_id": "CSAFPID-6212729", "product_identification_helper": { "cpe": "cpe:2.3:a:oracle:communications_unified_assurance:6.1.1-7.0.0:*:*:*:*:*:*:*" } } } ], "category": "product_name", "name": "Oracle Communications Unified Assurance" } ], "category": "product_family", "name": "Oracle Communications" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/19.3-24.3", "product": { "name": "vers:unknown/19.3-24.3", "product_id": "CSAFPID-8879384", "product_identification_helper": { "cpe": "cpe:/a:oracle:sqldeveloper:19.3-24.3" } } } ], "category": "product_name", "name": "SQL Developer" } ], "category": "vendor", "name": "Oracle" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/4.1.0", "product": { "name": "vers:unknown/4.1.0", "product_id": "CSAFPID-6056457" } }, { "category": "product_version_range", "name": "vers:unknown/4.1.0-rc3", "product": { "name": "vers:unknown/4.1.0-rc3", "product_id": "CSAFPID-8761501" } }, { "category": "product_version_range", "name": "vers:unknown/4.1.1", "product": { "name": "vers:unknown/4.1.1", "product_id": "CSAFPID-8761499" } }, { "category": "product_version_range", "name": "vers:unknown/4.1.1-rc1", "product": { "name": "vers:unknown/4.1.1-rc1", "product_id": "CSAFPID-8761500" } }, { "category": "product_version_range", "name": "vers:unknown/4.1.1-rc2", "product": { "name": "vers:unknown/4.1.1-rc2", "product_id": "CSAFPID-8761498" } }, { "category": "product_version_range", "name": "vers:unknown/<3.9.2", "product": { "name": "vers:unknown/<3.9.2", "product_id": "CSAFPID-6009403" } }, { "category": "product_version_range", "name": "vers:unknown/<4.0.1", "product": { "name": "vers:unknown/<4.0.1", "product_id": "CSAFPID-6056648" } }, { "category": "product_version_range", "name": "vers:unknown/<4.1.2", "product": { "name": "vers:unknown/<4.1.2", "product_id": "CSAFPID-6009402" } }, { "category": "product_version_range", "name": "vers:unknown/<4.2.0", "product": { "name": "vers:unknown/<4.2.0", "product_id": "CSAFPID-6009405" } }, { "category": "product_version_range", "name": "vers:unknown/>=4.1.0|<4.1.2", "product": { "name": "vers:unknown/>=4.1.0|<4.1.2", "product_id": "CSAFPID-6217226", "product_identification_helper": { "cpe": "cpe:2.3:a:apache:kafka:*:*:*:*:*:*:*:*" } } } ], "category": "product_name", "name": "Kafka" } ], "category": "vendor", "name": "Apache" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/>=4.1.0|<4.1.2", "product": { "name": "vers:unknown/>=4.1.0|<4.1.2", "product_id": "CSAFPID-6222647" } } ], "category": "product_name", "name": "kafka" } ], "category": "vendor", "name": "Bitnami" }, { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/2.2.0u2-0ubuntu3.1", "product": { "name": "vers:unknown/2.2.0u2-0ubuntu3.1", "product_id": "CSAFPID-6211987", "product_identification_helper": { "purl": "pkg:deb/ubuntu/kafka@2.2.0u2-0ubuntu3.1?arch=source&distro=esm-apps/bionic" } } }, { "category": "product_version_range", "name": "vers:unknown/2.2.0u2-0ubuntu3.2", "product": { "name": "vers:unknown/2.2.0u2-0ubuntu3.2", "product_id": "CSAFPID-6211988", "product_identification_helper": { "purl": "pkg:deb/ubuntu/kafka@2.2.0u2-0ubuntu3.2?arch=source&distro=esm-apps/bionic" } } }, { "category": "product_version_range", "name": "vers:unknown/2.2.2u1-0ubuntu1+esm2", "product": { "name": "vers:unknown/2.2.2u1-0ubuntu1+esm2", "product_id": "CSAFPID-6211989", "product_identification_helper": { "purl": "pkg:deb/ubuntu/kafka@2.2.2u1-0ubuntu1%2Besm2?arch=source&distro=esm-apps/bionic" } } }, { "category": "product_version_range", "name": "vers:unknown/>=0", "product": { "name": "vers:unknown/>=0", "product_id": "CSAFPID-6211990" } } ], "category": "product_name", "name": "kafka" } ], "category": "product_family", "name": "Ubuntu:Pro:18.04:LTS" } ], "category": "vendor", "name": "Ubuntu" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/4.1.0", "product": { "name": "vers:unknown/4.1.0", "product_id": "CSAFPID-6235893", "product_identification_helper": { "purl": "pkg:maven/org.apache.kafka/kafka-clients@4.1.0" } } }, { "category": "product_version_range", "name": "vers:unknown/4.1.1", "product": { "name": "vers:unknown/4.1.1", "product_id": "CSAFPID-6235894", "product_identification_helper": { "purl": "pkg:maven/org.apache.kafka/kafka-clients@4.1.1" } } }, { "category": "product_version_range", "name": "vers:unknown/>=4.1.0|<4.1.2", "product": { "name": "vers:unknown/>=4.1.0|<4.1.2", "product_id": "CSAFPID-6235895" } } ], "category": "product_name", "name": "kafka-clients" } ], "category": "vendor", "name": "apache" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/4.1.2", "product": { "name": "vers:unknown/4.1.2", "product_id": "CSAFPID-7432987" } } ], "category": "product_name", "name": "maven/org.apache.kafka/kafka-clients" } ], "category": "vendor", "name": "org.apache.kafka" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-33557", "cwe": { "id": "CWE-1285", "name": "Improper Validation of Specified Index, Position, or Offset in Input" }, "notes": [ { "category": "description", "text": "A possible security vulnerability has been identified in Apache Kafka.\n\nBy default, the broker property `sasl.oauthbearer.jwt.validator.class` is set to `org.apache.kafka.common.security.oauthbearer.DefaultJwtValidator`. It accepts any JWT token without validating its signature, issuer, or audience. An attacker can generate a JWT token from any issuer with the `preferred_username` set to any user, and the broker will accept it.\n\nWe advise the Kafka users using kafka v4.1.0 or v4.1.1 to set the config `sasl.oauthbearer.jwt.validator.class` to `org.apache.kafka.common.security.oauthbearer.BrokerJwtValidator` explicitly to avoid this vulnerability. Since Kafka v4.1.2 and v4.2.0 and later, the issue is fixed and will correctly validate the JWT token.", "title": "cveprojectv5 - https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/33xxx/CVE-2026-33557.json" }, { "category": "description", "text": "A possible security vulnerability has been identified in Apache Kafka.\n\nBy default, the broker property `sasl.oauthbearer.jwt.validator.class` is set to `org.apache.kafka.common.security.oauthbearer.DefaultJwtValidator`. It accepts any JWT token without validating its signature, issuer, or audience. An attacker can generate a JWT token from any issuer with the `preferred_username` set to any user, and the broker will accept it.\n\nWe advise the Kafka users using kafka v4.1.0 or v4.1.1 to set the config `sasl.oauthbearer.jwt.validator.class` to `org.apache.kafka.common.security.oauthbearer.BrokerJwtValidator` explicitly to avoid this vulnerability. Since Kafka v4.1.2 and v4.2.0 and later, the issue is fixed and will correctly validate the JWT token.", "title": "nvd - https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-33557" }, { "category": "description", "text": "[Unknown description]", "title": "osv - https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/Ubuntu%2FUBUNTU-CVE-2026-33557.json?alt=media" }, { "category": "description", "text": "A possible security vulnerability has been identified in Apache Kafka.\n\nBy default, the broker property `sasl.oauthbearer.jwt.validator.class` is set to `org.apache.kafka.common.security.oauthbearer.DefaultJwtValidator`. It accepts any JWT token without validating its signature, issuer, or audience. An attacker can generate a JWT token from any issuer with the `preferred_username` set to any user, and the broker will accept it.\n\nWe advise the Kafka users using kafka v4.1.0 or v4.1.1 to set the config `sasl.oauthbearer.jwt.validator.class` to `org.apache.kafka.common.security.oauthbearer.BrokerJwtValidator` explicitly to avoid this vulnerability. Since Kafka v4.1.2 and v4.2.0 and later, the issue is fixed and will correctly validate the JWT token.", "title": "osv - https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/Bitnami%2FBIT-kafka-2026-33557.json?alt=media" }, { "category": "description", "text": "A security vulnerability has been identified in Apache Kafka. By default, the broker property `sasl.oauthbearer.jwt.validator.class` is set to `org.apache.kafka.common.security.oauthbearer.DefaultJwtValidator`. It accepts any JWT token without validating its signature, issuer, or audience. An attacker can generate a JWT token from any issuer with the `preferred_username` set to any user, and the broker will accept it.\n\nApache advises Kafka users using kafka v4.1.0 or v4.1.1 to set the config `sasl.oauthbearer.jwt.validator.class` to `org.apache.kafka.common.security.oauthbearer.BrokerJwtValidator` explicitly to avoid this vulnerability. Since Kafka v4.1.2 and v4.2.0 and later, the issue is fixed and will correctly validate the JWT token.", "title": "github - https://api.github.com/advisories/GHSA-28jg-cgg7-j4wc" }, { "category": "description", "text": "A security vulnerability has been identified in Apache Kafka. By default, the broker property `sasl.oauthbearer.jwt.validator.class` is set to `org.apache.kafka.common.security.oauthbearer.DefaultJwtValidator`. It accepts any JWT token without validating its signature, issuer, or audience. An attacker can generate a JWT token from any issuer with the `preferred_username` set to any user, and the broker will accept it.\n\nApache advises Kafka users using kafka v4.1.0 or v4.1.1 to set the config `sasl.oauthbearer.jwt.validator.class` to `org.apache.kafka.common.security.oauthbearer.BrokerJwtValidator` explicitly to avoid this vulnerability. Since Kafka v4.1.2 and v4.2.0 and later, the issue is fixed and will correctly validate the JWT token.", "title": "osv - https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/Maven%2FGHSA-28jg-cgg7-j4wc.json?alt=media" }, { "category": "description", "text": "A security vulnerability has been identified in Apache Kafka. By default, the broker property `sasl.oauthbearer.jwt.validator.class` is set to `org.apache.kafka.common.security.oauthbearer.DefaultJwtValidator`. It accepts any JWT token without validating its signature, issuer, or audience. An attacker can generate a JWT token from any issuer with the `preferred_username` set to any user, and the broker will accept it.\n\nApache advises Kafka users using kafka v4.1.0 or v4.1.1 to set the config `sasl.oauthbearer.jwt.validator.class` to `org.apache.kafka.common.security.oauthbearer.BrokerJwtValidator` explicitly to avoid this vulnerability. Since Kafka v4.1.2 and v4.2.0 and later, the issue is fixed and will correctly validate the JWT token.", "title": "gitlab - https://gitlab.com/api/v4/projects/25847700/repository/files/maven%2Forg.apache.kafka%2Fkafka-clients%2FCVE-2026-33557.yml/raw" }, { "category": "description", "text": "Vulnerability in the Oracle Communications Unified Assurance product of Oracle Communications (component: Message Bus (Apache Kafka)). Supported versions that are affected are 6.1.1-7.0.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via TCP to compromise Oracle Communications Unified Assurance. Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Oracle Communications Unified Assurance accessible data as well as unauthorized access to critical data or complete access to all Oracle Communications Unified Assurance accessible data. CVSS 3.1 Base Score 9.1 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N).", "title": "oracle - https://www.oracle.com/a/tech/docs/security-alerts/cspumay2026csaf.json" }, { "category": "description", "text": "Vulnerability in the Oracle Communications Unified Assurance product of Oracle Communications (component: Message Bus (Apache Kafka)). Supported versions that are affected are 6.1.1-7.0.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via TCP to compromise Oracle Communications Unified Assurance. Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Oracle Communications Unified Assurance accessible data as well as unauthorized access to critical data or complete access to all Oracle Communications Unified Assurance accessible data. CVSS 3.1 Base Score 9.1 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N).", "title": "oracle - https://www.oracle.com/docs/tech/security-alerts/cspumay2026csaf.json" }, { "category": "description", "text": "A possible security vulnerability has been identified in Apache Kafka.\n\nBy default, the broker property `sasl.oauthbearer.jwt.validator.class` is set to `org.apache.kafka.common.security.oauthbearer.DefaultJwtValidator`. It accepts any JWT token without validating its signature, issuer, or audience. An attacker can generate a JWT token from any issuer with the `preferred_username` set to any user, and the broker will accept it.\n\nWe advise the Kafka users using kafka v4.1.0 or v4.1.1 to set the config `sasl.oauthbearer.jwt.validator.class` to `org.apache.kafka.common.security.oauthbearer.BrokerJwtValidator` explicitly to avoid this vulnerability. Since Kafka v4.1.2 and v4.2.0 and later, the issue is fixed and will correctly validate the JWT token.", "title": "osv - https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/GIT%2FCVE-2026-33557.json?alt=media" }, { "category": "other", "text": "0.005", "title": "EPSS" }, { "category": "other", "text": "5.1", "title": "NCSC Score" }, { "category": "other", "text": "There is product data available from source Certbundde, VENDOR FIX as product remediation category", "title": "NCSC Score top increasing factors" }, { "category": "other", "text": "Is related to a product by vendor Apache, There is cwe data available from source Github", "title": "NCSC Score top decreasing factors" } ], "product_status": { "fixed": [ "CSAFPID-7432987" ], "known_affected": [ "CSAFPID-6009402", "CSAFPID-6009403", "CSAFPID-6009405", "CSAFPID-6056648", "CSAFPID-6174846", "CSAFPID-6211987", "CSAFPID-6211988", "CSAFPID-6211989", "CSAFPID-6211990", "CSAFPID-6217226", "CSAFPID-6222647", "CSAFPID-6235893", "CSAFPID-6235894", "CSAFPID-6235895", "CSAFPID-7942221", "CSAFPID-6212729", "CSAFPID-6056457", "CSAFPID-8761498", "CSAFPID-8761499", "CSAFPID-8761500", "CSAFPID-8761501", "CSAFPID-1549107", "CSAFPID-1549109", "CSAFPID-1847010", "CSAFPID-5129879", "CSAFPID-5452508", "CSAFPID-1847004", "CSAFPID-1847007", "CSAFPID-2726519", "CSAFPID-8878805", "CSAFPID-8878806", "CSAFPID-8878807", "CSAFPID-8878808", "CSAFPID-8878809", "CSAFPID-8879357", "CSAFPID-8879358", "CSAFPID-8879359", "CSAFPID-8879360", "CSAFPID-8879361", "CSAFPID-8879362", "CSAFPID-8879384" ] }, "references": [ { "category": "external", "summary": "Source - certbundde", "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-1166.json" }, { "category": "external", "summary": "Source - cveprojectv5", "url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/33xxx/CVE-2026-33557.json" }, { "category": "external", "summary": "Source - nvd", "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-33557" }, { "category": "external", "summary": "Source - first", "url": "https://api.first.org/data/v1/epss?limit=10000&offset=0" }, { "category": "external", "summary": "Source - osv", "url": "https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/Ubuntu%2FUBUNTU-CVE-2026-33557.json?alt=media" }, { "category": "external", "summary": "Source - osv", "url": "https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/Bitnami%2FBIT-kafka-2026-33557.json?alt=media" }, { "category": "external", "summary": "Source - github", "url": "https://api.github.com/advisories/GHSA-28jg-cgg7-j4wc" }, { "category": "external", "summary": "Source - osv", "url": "https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/Maven%2FGHSA-28jg-cgg7-j4wc.json?alt=media" }, { "category": "external", "summary": "Source - gitlab", "url": "https://gitlab.com/api/v4/projects/25847700/repository/files/maven%2Forg.apache.kafka%2Fkafka-clients%2FCVE-2026-33557.yml/raw" }, { "category": "external", "summary": "Source - first", "url": "https://api.first.org/data/v1/epss?limit=10000&offset=10000" }, { "category": "external", "summary": "Source - certbundde", "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-1723.json" }, { "category": "external", "summary": "Source - oracle", "url": "https://www.oracle.com/a/tech/docs/security-alerts/cspumay2026csaf.json" }, { "category": "external", "summary": "Source - oracle", "url": "https://www.oracle.com/docs/tech/security-alerts/cspumay2026csaf.json" }, { "category": "external", "summary": "Source - osv", "url": "https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/GIT%2FCVE-2026-33557.json?alt=media" }, { "category": "external", "summary": "Source - certbundde", "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-2445.json" }, { "category": "external", "summary": "Source - certbundde", "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-2444.json" }, { "category": "external", "summary": "Source - certbundde", "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-2436.json" }, { "category": "external", "summary": "Source - certbundde", "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-2437.json" }, { "category": "external", "summary": "Source - certbundde", "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-2431.json" }, { "category": "external", "summary": "Source - ncscclear", "url": "https://advisories.ncsc.nl/advisory?id=NCSC-2026-0254" }, { "category": "external", "summary": "Source - ncscclear", "url": "https://advisories.ncsc.nl/advisory?id=NCSC-2026-0256" }, { "category": "external", "summary": "Source - ncscclear", "url": "https://advisories.ncsc.nl/advisory?id=NCSC-2026-0258" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-1166.json" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-1166" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://lists.apache.org/list.html?users%40kafka_apache_org" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://seclists.org/oss-sec/2026/q2/156" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://seclists.org/oss-sec/2026/q2/157" }, { "category": "external", "summary": "Reference - cveprojectv5; github; gitlab; nvd; osv", "url": "https://kafka.apache.org/cve-list" }, { "category": "external", "summary": "Reference - cveprojectv5; github; gitlab; nvd; osv", "url": "https://lists.apache.org/thread/v57o00hm6yszdpdnvqx2ss4561yh953h" }, { "category": "external", "summary": "Reference - cveprojectv5; github; nvd; osv", "url": "http://www.openwall.com/lists/oss-security/2026/04/17/2" }, { "category": "external", "summary": "Reference - osv", "url": "https://ubuntu.com/security/CVE-2026-33557" }, { "category": "external", "summary": "Reference - osv", "url": "https://www.cve.org/CVERecord?id=CVE-2026-33557" }, { "category": "external", "summary": "Reference - github; gitlab; osv", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33557" }, { "category": "external", "summary": "Reference - github; gitlab; osv", "url": "https://github.com/apache/kafka/commit/01d8e7db8d08dbd538892b409457ea6bfcc2a422" }, { "category": "external", "summary": "Reference - github; gitlab", "url": "https://github.com/advisories/GHSA-28jg-cgg7-j4wc" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-1723.json" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-1723" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://www.oracle.com/security-alerts/cspumay2026.html#AppendixCGBU" }, { "category": "external", "summary": "Reference - oracle", "url": "https://www.oracle.com/security-alerts/cspumay2026.html" }, { "category": "external", "summary": "Reference - oracle", "url": "https://www.oracle.com/docs/tech/security-alerts/cspumay2026csaf.json" }, { "category": "external", "summary": "Reference - cveprojectv5; nvd; osv", "url": "https://access.redhat.com/security/cve/CVE-2026-33557" }, { "category": "external", "summary": "Reference - cveprojectv5; nvd; osv", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2459739" }, { "category": "external", "summary": "Reference - cveprojectv5; nvd; osv", "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33557.json" }, { "category": "external", "summary": "Reference - osv", "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33557.json" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-2444.json" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-2444" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://www.oracle.com/security-alerts/cpujul2026.html#AppendixFMW" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-2445.json" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-2445" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://www.oracle.com/security-alerts/cpujul2026.html#AppendixIFLX" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-2436.json" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-2436" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://www.oracle.com/security-alerts/cpujul2026.html#AppendixPVA" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-2437.json" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-2437" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://www.oracle.com/security-alerts/cpujul2026.html#AppendixCGBU" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-2431.json" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-2431" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://www.oracle.com/security-alerts/cpujul2026.html#AppendixSQLD" } ], "remediations": [ { "category": "vendor_fix", "details": "Oracle customers with valid support contracts", "product_ids": [ "CSAFPID-6212729" ], "url": "https://support.oracle.com/support/?documentId=CPU166" } ], "scores": [ { "cvss_v3": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N", "baseScore": 9.1, "baseSeverity": "CRITICAL" }, "products": [ "CSAFPID-1549107", "CSAFPID-1549109", "CSAFPID-1847004", "CSAFPID-1847007", "CSAFPID-1847010", "CSAFPID-2726519", "CSAFPID-5129879", "CSAFPID-5452508", "CSAFPID-6009402", "CSAFPID-6009403", "CSAFPID-6009405", "CSAFPID-6056457", "CSAFPID-6056648", "CSAFPID-6174846", "CSAFPID-6211987", "CSAFPID-6211988", "CSAFPID-6211989", "CSAFPID-6211990", "CSAFPID-6212729", "CSAFPID-6217226", "CSAFPID-6222647", "CSAFPID-6235893", "CSAFPID-6235894", "CSAFPID-6235895", "CSAFPID-7942221", "CSAFPID-8761498", "CSAFPID-8761499", "CSAFPID-8761500", "CSAFPID-8761501", "CSAFPID-8878805", "CSAFPID-8878806", "CSAFPID-8878807", "CSAFPID-8878808", "CSAFPID-8878809", "CSAFPID-8879357", "CSAFPID-8879358", "CSAFPID-8879359", "CSAFPID-8879360", "CSAFPID-8879361", "CSAFPID-8879362", "CSAFPID-8879384" ] } ], "title": "CVE-2026-33557" } ] }