{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-66075", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-07-23T23:25:28.897Z", "datePublished": "2026-09-23T20:39:59.299Z", "dateUpdated": "2026-09-24T13:51:02.034Z"}, "containers": {"cna": {"title": "RabbitMQ: Monitoring-tag user can restart federation links", "problemTypes": [{"descriptions": [{"cweId": "CWE-862", "lang": "en", "description": "CWE-862: Missing Authorization", "type": "CWE"}]}], "metrics": [{"cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "LOW", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 2.3, "baseSeverity": "LOW", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N", "version": "4.0"}}], "references": [{"name": "https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-g5v3-w5xg-62q2", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-g5v3-w5xg-62q2"}, {"name": "https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.6", "tags": ["x_refsource_MISC"], "url": "https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.6"}, {"name": "https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.3.1", "tags": ["x_refsource_MISC"], "url": "https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.3.1"}], "affected": [{"vendor": "rabbitmq", "product": "rabbitmq-server", "versions": [{"version": ">= 3.13.0, < 3.13.15", "status": "affected"}, {"version": ">= 4.0.0, < 4.0.20", "status": "affected"}, {"version": ">= 4.1.0, < 4.1.11", "status": "affected"}, {"version": ">= 4.2.0, < 4.2.6", "status": "affected"}, {"version": ">= 4.3.0, < 4.3.1", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-09-23T20:39:59.299Z"}, "descriptions": [{"lang": "en", "value": "RabbitMQ is a messaging and streaming broker. Prior to versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.1, is_authorized/2 for the /federation-links/.../restart route uses is_authorized_monitor (accepts the monitoring tag), while allowed_methods permits DELETE and delete_resource/2 triggers rabbit_federation_link_sup:restart. There is no per-method elevation check and no comment marking it intentional. A read-only monitoring user can restart any federation link , a state-changing operation that disrupts message flow. Preconditions include rabbitmq_federation + rabbitmq_federation_management plugins enabled Attacker has credentials with the monitoring tag. This issue is fixed in versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.1."}], "source": {"advisory": "GHSA-g5v3-w5xg-62q2", "discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-09-24T13:50:50.462399Z", "id": "CVE-2026-66075", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-24T13:51:02.034Z"}}]}}

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{"affected": [{"affectedData": [{"product": "rabbitmq-server", "vendor": "rabbitmq", "versions": [{"status": "affected", "version": ">= 3.13.0, < 3.13.15"}, {"status": "affected", "version": ">= 4.0.0, < 4.0.20"}, {"status": "affected", "version": ">= 4.1.0, < 4.1.11"}, {"status": "affected", "version": ">= 4.2.0, < 4.2.6"}, {"status": "affected", "version": ">= 4.3.0, < 4.3.1"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:broadcom:rabbitmq_server:*:*:*:*:*:*:*:*", "matchCriteriaId": "603E40A7-6B53-47D4-A522-17B013CE7607", "versionEndExcluding": "3.13.15", "versionStartIncluding": "3.13.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:broadcom:rabbitmq_server:*:*:*:*:*:*:*:*", "matchCriteriaId": "9B5D0326-EB2B-40B8-98BD-ECE547F96DA4", "versionEndExcluding": "4.0.20", "versionStartIncluding": "4.0.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:broadcom:rabbitmq_server:*:*:*:*:*:*:*:*", "matchCriteriaId": "01F24286-9982-4592-A370-70E55D6572D5", "versionEndExcluding": "4.1.11", "versionStartIncluding": "4.1.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:broadcom:rabbitmq_server:*:*:*:*:*:*:*:*", "matchCriteriaId": "7179C053-B8C1-4B72-83EB-456125ED1AAF", "versionEndExcluding": "4.2.6", "versionStartIncluding": "4.2.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:broadcom:rabbitmq_server:*:*:*:*:*:*:*:*", "matchCriteriaId": "41410FDE-4B5E-4466-B7C4-A62FEBFA0C80", "versionEndExcluding": "4.3.1", "versionStartIncluding": "4.3.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "RabbitMQ is a messaging and streaming broker. Prior to versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.1, is_authorized/2 for the /federation-links/.../restart route uses is_authorized_monitor (accepts the monitoring tag), while allowed_methods permits DELETE and delete_resource/2 triggers rabbit_federation_link_sup:restart. There is no per-method elevation check and no comment marking it intentional. A read-only monitoring user can restart any federation link , a state-changing operation that disrupts message flow. Preconditions include rabbitmq_federation + rabbitmq_federation_management plugins enabled Attacker has credentials with the monitoring tag. This issue is fixed in versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.1."}], "id": "CVE-2026-66075", "lastModified": "2026-10-19T20:37:29.727", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 5.4, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 2.5, "source": "nvd@nist.gov", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 2.3, "baseSeverity": "LOW", "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:P/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-2026-66075", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-09-24T13:50:50.462399Z", "version": "2.0.3"}}]}, "published": "2026-09-23T21:16:59.500", "references": [{"source": "security-advisories@github.com", "tags": ["Release Notes"], "url": "https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.6"}, {"source": "security-advisories@github.com", "tags": ["Release Notes"], "url": "https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.3.1"}, {"source": "security-advisories@github.com", "tags": ["Vendor Advisory"], "url": "https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-g5v3-w5xg-62q2"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-862"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{"affected_release": [{"advisory": "RHSA-2026:67552", "cpe": "cpe:/a:redhat:hummingbird:1", "package": "rabbitmq-server4-3-main-4.3.6-1.hum1", "product_name": "Red Hat Hardened Images", "release_date": "2026-09-15T00:00:00Z"}], "bugzilla": {"description": "rabbitmq-server: RabbitMQ: Monitoring user can disrupt message flow via authorization flaw", "id": "2539777", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2539777"}, "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": "verified"}, "cwe": "CWE-862", "details": ["RabbitMQ is a messaging and streaming broker. Prior to versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.1, is_authorized/2 for the /federation-links/.../restart route uses is_authorized_monitor (accepts the monitoring tag), while allowed_methods permits DELETE and delete_resource/2 triggers rabbit_federation_link_sup:restart. There is no per-method elevation check and no comment marking it intentional. A read-only monitoring user can restart any federation link , a state-changing operation that disrupts message flow. Preconditions include rabbitmq_federation + rabbitmq_federation_management plugins enabled Attacker has credentials with the monitoring tag. This issue is fixed in versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.1.", "A flaw was found in RabbitMQ, a messaging and streaming broker. A remote attacker with monitoring user credentials can exploit an authorization flaw to restart federation links. This unauthorized action disrupts message flow, leading to a denial of service (DoS) for affected services. This vulnerability occurs when the rabbitmq_federation and rabbitmq_federation_management plugins are enabled."], "mitigation": {"lang": "en:us", "value": "Restrict monitoring access and disable federation management where it is not needed."}, "name": "CVE-2026-66075", "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:openstack:13", "fix_state": "Not affected", "package_name": "rabbitmq-server", "product_name": "Red Hat OpenStack Platform 13 (Queens)"}, {"cpe": "cpe:/a:redhat:openstack:16.2", "fix_state": "Not affected", "package_name": "rabbitmq-server", "product_name": "Red Hat OpenStack Platform 16.2"}, {"cpe": "cpe:/a:redhat:openstack:17.1", "fix_state": "Not affected", "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": "2026-09-23T20:39:59Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-66075\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-66075\nhttps://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.6\nhttps://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.3.1\nhttps://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-g5v3-w5xg-62q2"], "statement": "Red Hat rates this flaw MODERATE in products that ship affected RabbitMQ builds because a monitoring-only user can invoke an unauthorized federation-link restart. When the federation and federation-management plugins are enabled, that restart can briefly interrupt cross-cluster message flow.", "threat_severity": "Moderate"}