CVE-2026-63337

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{"affected": [{"affectedData": [{"product": "rabbitmq-java-client", "vendor": "rabbitmq", "versions": [{"status": "affected", "version": "< 5.33.0"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The RabbitMQ Java client library allows Java and JVM-based applications to connect to and interact with RabbitMQ nodes. Prior to 5.33.0, com.rabbitmq.tools.jsonrpc.ProcedureDescription receives a javaReturnType value in an untrusted system.describe response and passes it through JSONUtil.tryFill, setJavaReturnType, and computeReturnTypeAsJavaClass to Class.forName(javaReturnType) with initialization enabled. An attacker able to answer the JsonRpcClient request through a shared broker or network interception can select a class already present in the victim JVM and trigger its static initializer, while JsonRpcClient.java later passes getReturnType output to mapper.parse and may also create type confusion. Successful exploitation can affect confidentiality, integrity, and availability in the client process. This issue is fixed in version 5.33.0."}, {"lang": "es", "value": "La biblioteca cliente Java de RabbitMQ permite a las aplicaciones Java y basadas en JVM conectarse e interactuar con nodos RabbitMQ. Antes de la versi\u00f3n 5.33.0, com.rabbitmq.tools.jsonrpc.ProcedureDescription recibe un valor javaReturnType en una respuesta system.describe no confiable y lo pasa a trav\u00e9s de JSONUtil.tryFill, setJavaReturnType y computeReturnTypeAsJavaClass a Class.forName(javaReturnType) con la inicializaci\u00f3n habilitada. Un atacante capaz de responder a la solicitud de JsonRpcClient a trav\u00e9s de un intermediario compartido o una intercepci\u00f3n de red puede seleccionar una clase ya presente en la JVM de la v\u00edctima y activar su inicializador est\u00e1tico, mientras que JsonRpcClient.java posteriormente pasa la salida de getReturnType a mapper.parse y tambi\u00e9n puede crear confusi\u00f3n de tipos. La explotaci\u00f3n exitosa puede afectar la confidencialidad, la integridad y la disponibilidad en el proceso del cliente. Este problema est\u00e1 solucionado en la versi\u00f3n 5.33.0."}], "id": "CVE-2026-63337", "lastModified": "2026-10-22T22:10:00.250", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "LOW", "subConfidentialityImpact": "LOW", "subIntegrityImpact": "LOW", "userInteraction": "PASSIVE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-63337", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-08-18T19:08:47.576010Z", "version": "2.0.3"}}]}, "published": "2026-08-18T17:17:00.423", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/rabbitmq/rabbitmq-java-client/commit/0032f75f9dc3df847f94b2b85a16119250bf63cb"}, {"source": "security-advisories@github.com", "url": "https://github.com/rabbitmq/rabbitmq-java-client/commit/9f8e7efd0c648f235dc0e96232ae7efa75ea4fa8"}, {"source": "security-advisories@github.com", "url": "https://github.com/rabbitmq/rabbitmq-java-client/pull/2000"}, {"source": "security-advisories@github.com", "url": "https://github.com/rabbitmq/rabbitmq-java-client/pull/2002"}, {"source": "security-advisories@github.com", "url": "https://github.com/rabbitmq/rabbitmq-java-client/releases/tag/v5.33.0"}, {"source": "security-advisories@github.com", "url": "https://github.com/rabbitmq/rabbitmq-java-client/security/advisories/GHSA-6g32-pxv4-2wfj"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/rabbitmq/rabbitmq-java-client/security/advisories/GHSA-6g32-pxv4-2wfj"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-470"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,5.33.0)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "manual", "scores": [{"score": 100.0, "source": "manual"}]}, "original": {"product": "rabbitmq-java-client", "source": "cna", "vendor": "rabbitmq"}, "product": "java-client", "vendor": "rabbitmq"}], "created": "2026-08-18T17:30:15.507543+00:00", "updated": "2026-08-21T21:18:10.924622+00:00", "vendors": ["rabbitmq", "rabbitmq$PRODUCT$java-client"]}