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vuln-cve/data/2026/66xxx/CVE-2026-66067.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-66067",
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"state": "PUBLISHED",
"assignerShortName": "GitHub_M",
"dateReserved": "2026-07-23T23:25:28.897Z",
"datePublished": "2026-09-23T20:12:00.076Z",
"dateUpdated": "2026-09-24T14:11:44.566Z"
},
"containers": {
"cna": {
"title": "RabbitMQ: Stream protocol skips per vhost per user connection limits",
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-770",
"lang": "en",
"description": "CWE-770: Allocation of Resources Without Limits or Throttling",
"type": "CWE"
}
]
}
],
"metrics": [
{
"cvssV4_0": {
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"attackRequirements": "PRESENT",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE",
"vulnAvailabilityImpact": "HIGH",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"subAvailabilityImpact": "NONE",
"baseScore": 6,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"version": "4.0"
}
}
],
"references": [
{
"name": "https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-hwqx-2gfg-89qf",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-hwqx-2gfg-89qf"
},
{
"name": "https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.7",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.7"
},
{
"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": ">= 4.2.0, < 4.2.7",
"status": "affected"
},
{
"version": ">= 4.3.0, < 4.3.1",
"status": "affected"
}
]
}
],
"providerMetadata": {
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M",
"dateUpdated": "2026-09-23T20:12:00.076Z"
},
"descriptions": [
{
"lang": "en",
"value": "RabbitMQ is a messaging and streaming broker. Prior to versions 4.2.7 and 4.3.1, The stream open handler calls only check_vhost_access; it omits the node/vhost/user connection-limit checks that rabbit_reader performs for AMQP. A developer %% FIXME comment at the cited line explicitly acknowledges the gap. No compensating enforcement exists in connection tracking or elsewhere in rabbitmq_stream. An authenticated tenant can fully bypass operator-configured per-user and per-vhost connection caps by connecting via port 5552 instead of 5672. Preconditions include rabbitmq_stream plugin enabled Authenticated stream-protocol credentials Operator relies on per-user/per-vhost connection limits for tenant isolation. This issue is fixed in versions 4.2.7 and 4.3.1."
}
],
"source": {
"advisory": "GHSA-hwqx-2gfg-89qf",
"discovery": "UNKNOWN"
}
},
"adp": [
{
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-09-24T14:11:25.836720Z",
"id": "CVE-2026-66067",
"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": "2026-09-24T14:11:44.566Z"
}
}
]
}
}