CVE-2026-67418

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{"affected": [{"affectedData": [{"product": "rabbitmq-server", "vendor": "rabbitmq", "versions": [{"status": "affected", "version": ">= 3.13.0, < 3.13.19"}, {"status": "affected", "version": ">= 4.0.0, < 4.0.24"}, {"status": "affected", "version": ">= 4.1.0, < 4.1.15"}, {"status": "affected", "version": ">= 4.2.0, < 4.2.10"}, {"status": "affected", "version": ">= 4.3.0, < 4.3.5"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "RabbitMQ is a messaging and streaming broker. From 3.13.0 until 3.13.19, 4.0.24, 4.1.15, 4.2.10, and 4.3.5, the MQTT 5 parser in deps/rabbitmq_mqtt/src/rabbit_mqtt_packet.erl accepts Request-Problem-Information on PUBLISH packets even though the property is valid only for CONNECT. An authenticated publisher with topic write permission can cause the broker to store and route that inapplicable property to a separately authenticated matching subscriber. When the subscriber path serializes the outbound PUBLISH, serialise_prop/2 has no matching clause, and the uncontained function_clause exception closes the victim MQTT or Web MQTT connection. The publisher connection and broker remain available, and queued replay, retained-message persistence, and broker-wide denial of service were not established. This issue is fixed in versions 3.13.19, 4.0.24, 4.1.15, 4.2.10, and 4.3.5."}], "id": "CVE-2026-67418", "lastModified": "2026-10-16T16:00:33.533", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 5.3, "baseSeverity": "MEDIUM", "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": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/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": "LOW", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-67418", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-10-14T17:52:54.774490Z", "version": "2.0.3"}}]}, "published": "2026-10-14T17:18:30.760", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/rabbitmq/rabbitmq-server/commit/4639a4318c72a0660e4bc014767fad70ce288fbc"}, {"source": "security-advisories@github.com", "url": "https://github.com/rabbitmq/rabbitmq-server/commit/908f944a1d581d10774f8d6d0dcf2a1a713779fb"}, {"source": "security-advisories@github.com", "url": "https://github.com/rabbitmq/rabbitmq-server/pull/17035"}, {"source": "security-advisories@github.com", "url": "https://github.com/rabbitmq/rabbitmq-server/pull/17287"}, {"source": "security-advisories@github.com", "url": "https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.3.5"}, {"source": "security-advisories@github.com", "url": "https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-jv99-v328-mvmm"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-248"}, {"lang": "en", "value": "CWE-1286"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{"bugzilla": {"description": "rabbitmq-server: rabbitmq-server: Denial of Service via invalid MQTT PUBLISH property", "id": "2552635", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2552635"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.3", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L", "status": "draft"}, "cwe": "CWE-248", "details": ["A flaw was found in rabbitmq-server. An authenticated user with message publishing permissions can transmit a specially crafted Message Queuing Telemetry Transport (MQTT) message containing an invalid property. When the broker forwards this message, an unhandled exception terminates the recipient's connection, leading to a targeted Denial of Service (DoS) for affected subscribers."], "name": "CVE-2026-67418", "package_state": [{"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Will not fix", "package_name": "rabbitmq-server4.2", "product_name": "Red Hat Hardened Images"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Affected", "package_name": "rabbitmq-server4.3", "product_name": "Red Hat Hardened Images"}, {"cpe": "cpe:/a:redhat:openstack:13", "fix_state": "Out of support scope", "package_name": "rabbitmq-server", "product_name": "Red Hat OpenStack Platform 13 (Queens)"}, {"cpe": "cpe:/a:redhat:openstack:16.2", "fix_state": "Out of support scope", "package_name": "rabbitmq-server", "product_name": "Red Hat OpenStack Platform 16.2"}, {"cpe": "cpe:/a:redhat:openstack:17.1", "fix_state": "Out of support scope", "package_name": "rabbitmq-server", "product_name": "Red Hat OpenStack Platform 17.1"}, {"cpe": "cpe:/a:redhat:openstack:18.0", "fix_state": "Fix deferred", "package_name": "rabbitmq-server", "product_name": "Red Hat OpenStack Platform 18.0"}], "public_date": "2026-10-14T16:07:29Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-67418\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-67418\nhttps://github.com/rabbitmq/rabbitmq-server/commit/4639a4318c72a0660e4bc014767fad70ce288fbc\nhttps://github.com/rabbitmq/rabbitmq-server/commit/908f944a1d581d10774f8d6d0dcf2a1a713779fb\nhttps://github.com/rabbitmq/rabbitmq-server/pull/17035\nhttps://github.com/rabbitmq/rabbitmq-server/pull/17287\nhttps://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.3.5\nhttps://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-jv99-v328-mvmm"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[3.13.0,3.13.19)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[4.0.0,4.0.24)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[4.1.0,4.1.15)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[4.2.0,4.2.10)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[4.3.0,4.3.5)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "rabbitmq-server", "source": "cna", "vendor": "rabbitmq"}, "product": "rabbitmq-server", "vendor": "rabbitmq"}], "created": "2026-10-15T00:30:07.337674+00:00", "updated": "2026-10-17T19:30:06.876763+00:00", "vendors": ["rabbitmq", "rabbitmq$PRODUCT$rabbitmq-server"]}