CVE-2026-67241

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{"affected": [{"affectedData": [{"product": "rabbitmq-server", "vendor": "rabbitmq", "versions": [{"status": "affected", "version": ">= 4.2.0, < 4.2.9"}, {"status": "affected", "version": ">= 4.3.0, < 4.3.3"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:broadcom:rabbitmq_server:*:*:*:*:*:*:*:*", "matchCriteriaId": "D35C2182-6B6E-4E76-98E7-6C928D64CCA8", "versionEndExcluding": "4.2.9", "versionStartIncluding": "4.2.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:broadcom:rabbitmq_server:*:*:*:*:*:*:*:*", "matchCriteriaId": "E6CDECF0-FDCF-4C38-AD9D-F7B1F1246AEB", "versionEndExcluding": "4.3.3", "versionStartIncluding": "4.3.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "RabbitMQ is a messaging and streaming broker. From 4.2.0 until 4.2.9 and 4.3.3, AMQP 1.0 management exchange.declare skips alternate-exchange permission check. pUT /exchanges/:name (lines 192-240) checks only configure on the declared exchange and passes XArgs straight to rabbitexchange:declare/7. It omits the checkreadpermitted(X) + checkwritepermitted(AE) that rabbitchannel.erl:2540-2548 enforces for the alternate-exchange argument on the AMQP 0-9-1 path. The same file already implements the analogous DLX check for queues (lines 708-719), confirming this is a missing-check bug rather than intentional A user with only configure on exchange X can route X's unroutable messages into an alternate exchange they have no write permission AMQP 1.0 enabled (default in RabbitMQ 4.x) Attacker has configure on at least one exchange but lacks write on the target. This issue is fixed in versions 4.2.9 and 4.3.3."}], "id": "CVE-2026-67241", "lastModified": "2026-10-16T16:31:17.443", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "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": 4.8, "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": "HIGH", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "LOW", "subIntegrityImpact": "HIGH", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:N/SC:L/SI:H/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": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-67241", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-09-29T19:25:44.226875Z", "version": "2.0.3"}}]}, "published": "2026-09-25T17:17:12.180", "references": [{"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/rabbitmq/rabbitmq-server/commit/18eac8d547b4382bf830c621b20a35932dd1cfa5"}, {"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/rabbitmq/rabbitmq-server/commit/56005e7cebffc478ef397573de24aff1167e7cda"}, {"source": "security-advisories@github.com", "tags": ["Release Notes"], "url": "https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.9"}, {"source": "security-advisories@github.com", "tags": ["Release Notes"], "url": "https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.3.3"}, {"source": "security-advisories@github.com", "tags": ["Vendor Advisory"], "url": "https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-rg2g-289m-xhhw"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Vendor Advisory"], "url": "https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-rg2g-289m-xhhw"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-862"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{"bugzilla": {"description": "rabbitmq-server: rabbitmq-server: Unauthorized message routing via missing alternate-exchange permission check", "id": "2541502", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2541502"}, "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:L/A:N", "status": "draft"}, "cwe": "CWE-639", "details": ["A flaw was found in rabbitmq-server. This vulnerability allows an authenticated user to bypass access controls and perform unauthorized message routing. When an exchange is declared via the Advanced Message Queuing Protocol (AMQP) 1.0 management interface, the application fails to verify write permissions for the specified alternate exchange. Consequently, an attacker with configuration rights on an exchange can route unroutable messages into restricted exchanges where they lack write authorization."], "name": "CVE-2026-67241", "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": "2026-09-25T16:12:14Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-67241\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-67241\nhttps://github.com/rabbitmq/rabbitmq-server/commit/18eac8d547b4382bf830c621b20a35932dd1cfa5\nhttps://github.com/rabbitmq/rabbitmq-server/commit/56005e7cebffc478ef397573de24aff1167e7cda\nhttps://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.9\nhttps://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.3.3\nhttps://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-rg2g-289m-xhhw"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[4.2.0,4.2.9)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[4.3.0,4.3.3)"}}], "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": "2026-09-25T18:45:17.771192+00:00", "updated": "2026-09-26T11:30:09.932722+00:00", "vendors": ["rabbitmq", "rabbitmq$PRODUCT$rabbitmq-server"]}