Medium
rabbitmq-server — security advisory
RabbitMQ is a messaging and streaming broker. From 4.0.0 until 4.0.22 and 4.1.14 and 4.2.7 and 4.3.1, Atom exhaustion: toatom on global-parameter :name. resourceexists/2 (and the PUT/DELETE handlers) call rabbitdatacoercion:toatom/1 on the :name URL path segment. toatom/1 uses binarytoatom/2 (unsafe). The endpoint requires policymaker (not management, but below A user with the policymaker tag can crash the node by exhausting the atom table via repeated requests to /api/global-parameters/:name with unique :name Management plugin enabled policymaker tag ~1M HTTP. This issue is fixed in versions 4.0.22 and 4.1.14 and 4.2.7 and 4.3.1.
- Products
- rabbitmq-server
- Affected versions
- 3.12.1-1, 3.12.1-1ubuntu1, 3.12.1-1ubuntu1.2, 3.12.1-1ubuntu1.4, 3.12.1-1ubuntu1.6, 3.12.1-1ubuntu1.7, 3.5.4-1, 3.5.4-3, 3.5.4-3.1, 3.5.7-1, 3.5.7-1ubuntu0.16.04.1, 3.5.7-1ubuntu0.16.04.2, 3.5.7-1ubuntu0.16.04.4, 3.5.7-1ubuntu0.16.04.4+esm1, 3.5.7-1ubuntu0.16.04.4+esm2, 3.5.7-1ubuntu0.16.04.4+esm3, 3.6.10-1, 3.6.10-1ubuntu0.1, 3.6.10-1ubuntu0.3, 3.6.10-1ubuntu0.4, 3.6.10-1ubuntu0.5, 3.6.10-1ubuntu0.5+esm1, 3.7.18-1, 3.7.8-4ubuntu2, 3.8.2-0ubuntu1, 3.8.2-0ubuntu1.1, 3.8.2-0ubuntu1.2, 3.8.2-0ubuntu1.3, 3.8.2-0ubuntu1.4, 3.8.2-0ubuntu1.5, 3.8.3-0ubuntu0.1, 3.8.3-0ubuntu0.2, 3.8.3-0ubuntu0.3, 3.8.3-0ubuntu0.3+esm1, 3.8.3-0ubuntu0.3+esm2, 3.8.9-3ubuntu1, 3.9.13-1, 3.9.13-1ubuntu0.22.04.1, 3.9.13-1ubuntu0.22.04.2, 3.9.27-0ubuntu0.1, 3.9.27-0ubuntu0.2, 3.9.27-0ubuntu0.5, 3.9.27-0ubuntu0.6, 3.9.8-1, 3.9.8-2, 3.9.8-3, 3.9.8-5, 3.9.8-6, 4.0.5-10ubuntu1, 4.0.5-10ubuntu2, 4.0.5-10ubuntu3, 4.0.5-10ubuntu4, 4.0.5-10ubuntu5, 4.0.5-10ubuntu5.1, 4.0.5-10ubuntu5.2, 4.0.5-8ubuntu2
- Fixed versions
- Not specified
- CVEs
- CVE-2026-67227
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 17:59 UTC · Revision 1
Source evidence
RabbitMQ is a messaging and streaming broker. From 4.0.0 until 4.0.22 and 4.1.14 and 4.2.7 and 4.3.1, Atom exhaustion: toatom on global-parameter :name. resourceexists/2 (and the PUT/DELETE handlers) call rabbitdatacoercion:toatom/1 on the :name URL path segment. toatom/1 uses binarytoatom/2 (unsafe). The endpoint requires policymaker (not management, but below A user with the policymaker tag can crash the node by exhausting the atom table via repeated requests to /api/global-parameters/:name with unique :name Management plugin enabled policymaker tag ~1M HTTP. This issue is fixed in versions 4.0.22 and 4.1.14 and 4.2.7 and 4.3.1.
osv:UBUNTU-CVE-2026-67227
rabbitmq-server
Fixed versions: Not specified
rabbitmq-server
Fixed versions: Not specified
rabbitmq-server
Fixed versions: Not specified
rabbitmq-server
Fixed versions: Not specified
rabbitmq-server
Fixed versions: Not specified
rabbitmq-server
Fixed versions: Not specified
Complete source record
{
"id": "11913d0073c56aae15ebe7b450781b56d1d4376b769cabda0a109491702905ee",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-67227",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-67227",
"summary": "RabbitMQ is a messaging and streaming broker. From 4.0.0 until 4.0.22 and 4.1.14 and 4.2.7 and 4.3.1, Atom exhaustion: toatom on global-parameter :name. resourceexists/2 (and the PUT/DELETE handlers) call rabbitdatacoercion:toatom/1 on the :name URL path segment. toatom/1 uses binarytoatom/2 (unsafe). The endpoint requires policymaker (not management, but below A user with the policymaker tag can crash the node by exhausting the atom table via repeated requests to /api/global-parameters/:name with unique :name Management plugin enabled policymaker tag ~1M HTTP. This issue is fixed in versions 4.0.22 and 4.1.14 and 4.2.7 and 4.3.1.",
"evidence": "osv:UBUNTU-CVE-2026-67227",
"products": [
{
"name": {
"value": "rabbitmq-server",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "3.5.4-1",
"evidence": "/affected/0/versions"
},
{
"value": "3.5.4-3",
"evidence": "/affected/0/versions"
},
{
"value": "3.5.4-3.1",
"evidence": "/affected/0/versions"
},
{
"value": "3.5.7-1",
"evidence": "/affected/0/versions"
},
{
"value": "3.5.7-1ubuntu0.16.04.1",
"evidence": "/affected/0/versions"
},
{
"value": "3.5.7-1ubuntu0.16.04.2",
"evidence": "/affected/0/versions"
},
{
"value": "3.5.7-1ubuntu0.16.04.4",
"evidence": "/affected/0/versions"
},
{
"value": "3.5.7-1ubuntu0.16.04.4+esm1",
"evidence": "/affected/0/versions"
},
{
"value": "3.5.7-1ubuntu0.16.04.4+esm2",
"evidence": "/affected/0/versions"
},
{
"value": "3.5.7-1ubuntu0.16.04.4+esm3",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "rabbitmq-server",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "3.6.10-1",
"evidence": "/affected/1/versions"
},
{
"value": "3.6.10-1ubuntu0.1",
"evidence": "/affected/1/versions"
},
{
"value": "3.6.10-1ubuntu0.3",
"evidence": "/affected/1/versions"
},
{
"value": "3.6.10-1ubuntu0.4",
"evidence": "/affected/1/versions"
},
{
"value": "3.6.10-1ubuntu0.5",
"evidence": "/affected/1/versions"
},
{
"value": "3.6.10-1ubuntu0.5+esm1",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
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"evidence": "/affected/2/package/name"
},
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"affected_versions": [
{
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"evidence": "/affected/2/versions"
},
{
"value": "3.7.18-1",
"evidence": "/affected/2/versions"
},
{
"value": "3.8.2-0ubuntu1",
"evidence": "/affected/2/versions"
},
{
"value": "3.8.2-0ubuntu1.1",
"evidence": "/affected/2/versions"
},
{
"value": "3.8.2-0ubuntu1.2",
"evidence": "/affected/2/versions"
},
{
"value": "3.8.2-0ubuntu1.3",
"evidence": "/affected/2/versions"
},
{
"value": "3.8.2-0ubuntu1.4",
"evidence": "/affected/2/versions"
},
{
"value": "3.8.2-0ubuntu1.5",
"evidence": "/affected/2/versions"
},
{
"value": "3.8.3-0ubuntu0.1",
"evidence": "/affected/2/versions"
},
{
"value": "3.8.3-0ubuntu0.2",
"evidence": "/affected/2/versions"
},
{
"value": "3.8.3-0ubuntu0.3",
"evidence": "/affected/2/versions"
},
{
"value": "3.8.3-0ubuntu0.3+esm1",
"evidence": "/affected/2/versions"
},
{
"value": "3.8.3-0ubuntu0.3+esm2",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
"value": "rabbitmq-server",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "3.8.9-3ubuntu1",
"evidence": "/affected/3/versions"
},
{
"value": "3.9.8-1",
"evidence": "/affected/3/versions"
},
{
"value": "3.9.8-2",
"evidence": "/affected/3/versions"
},
{
"value": "3.9.8-3",
"evidence": "/affected/3/versions"
},
{
"value": "3.9.8-5",
"evidence": "/affected/3/versions"
},
{
"value": "3.9.8-6",
"evidence": "/affected/3/versions"
},
{
"value": "3.9.13-1",
"evidence": "/affected/3/versions"
},
{
"value": "3.9.13-1ubuntu0.22.04.1",
"evidence": "/affected/3/versions"
},
{
"value": "3.9.13-1ubuntu0.22.04.2",
"evidence": "/affected/3/versions"
},
{
"value": "3.9.27-0ubuntu0.1",
"evidence": "/affected/3/versions"
},
{
"value": "3.9.27-0ubuntu0.2",
"evidence": "/affected/3/versions"
},
{
"value": "3.9.27-0ubuntu0.5",
"evidence": "/affected/3/versions"
},
{
"value": "3.9.27-0ubuntu0.6",
"evidence": "/affected/3/versions"
}
]
},
{
"name": {
"value": "rabbitmq-server",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "3.12.1-1",
"evidence": "/affected/4/versions"
},
{
"value": "3.12.1-1ubuntu1",
"evidence": "/affected/4/versions"
},
{
"value": "3.12.1-1ubuntu1.2",
"evidence": "/affected/4/versions"
},
{
"value": "3.12.1-1ubuntu1.4",
"evidence": "/affected/4/versions"
},
{
"value": "3.12.1-1ubuntu1.6",
"evidence": "/affected/4/versions"
},
{
"value": "3.12.1-1ubuntu1.7",
"evidence": "/affected/4/versions"
}
]
},
{
"name": {
"value": "rabbitmq-server",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "4.0.5-8ubuntu2",
"evidence": "/affected/5/versions"
},
{
"value": "4.0.5-10ubuntu1",
"evidence": "/affected/5/versions"
},
{
"value": "4.0.5-10ubuntu2",
"evidence": "/affected/5/versions"
},
{
"value": "4.0.5-10ubuntu3",
"evidence": "/affected/5/versions"
},
{
"value": "4.0.5-10ubuntu4",
"evidence": "/affected/5/versions"
},
{
"value": "4.0.5-10ubuntu5",
"evidence": "/affected/5/versions"
},
{
"value": "4.0.5-10ubuntu5.1",
"evidence": "/affected/5/versions"
},
{
"value": "4.0.5-10ubuntu5.2",
"evidence": "/affected/5/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "UBUNTU-CVE-2026-67227",
"aliases": [
"UBUNTU-CVE-2026-67227"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"
},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "rabbitmq-server",
"purl": "pkg:deb/ubuntu/rabbitmq-server?arch=source&distro=esm-infra-legacy%2Fxenial",
"ecosystem": "Ubuntu:Pro:16.04:LTS"
},
"versions": [
"3.5.4-1",
"3.5.4-3",
"3.5.4-3.1",
"3.5.7-1",
"3.5.7-1ubuntu0.16.04.1",
"3.5.7-1ubuntu0.16.04.2",
"3.5.7-1ubuntu0.16.04.4",
"3.5.7-1ubuntu0.16.04.4+esm1",
"3.5.7-1ubuntu0.16.04.4+esm2",
"3.5.7-1ubuntu0.16.04.4+esm3"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-67227.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "rabbitmq-server",
"binary_version": "3.5.7-1ubuntu0.16.04.4+esm3"
}
]
}
},
{
"ranges": [
{
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"events": [
{
"introduced": "0"
}
]
}
],
"package": {
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"purl": "pkg:deb/ubuntu/rabbitmq-server?arch=source&distro=esm-infra%2Fbionic",
"ecosystem": "Ubuntu:Pro:18.04:LTS"
},
"versions": [
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"3.6.10-1ubuntu0.1",
"3.6.10-1ubuntu0.3",
"3.6.10-1ubuntu0.4",
"3.6.10-1ubuntu0.5",
"3.6.10-1ubuntu0.5+esm1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-67227.json"
},
"ecosystem_specific": {
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{
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}
]
}
},
{
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}
]
}
],
"package": {
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"purl": "pkg:deb/ubuntu/rabbitmq-server?arch=source&distro=esm-infra%2Ffocal",
"ecosystem": "Ubuntu:Pro:20.04:LTS"
},
"versions": [
"3.7.8-4ubuntu2",
"3.7.18-1",
"3.8.2-0ubuntu1",
"3.8.2-0ubuntu1.1",
"3.8.2-0ubuntu1.2",
"3.8.2-0ubuntu1.3",
"3.8.2-0ubuntu1.4",
"3.8.2-0ubuntu1.5",
"3.8.3-0ubuntu0.1",
"3.8.3-0ubuntu0.2",
"3.8.3-0ubuntu0.3",
"3.8.3-0ubuntu0.3+esm1",
"3.8.3-0ubuntu0.3+esm2"
],
"database_specific": {
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},
"ecosystem_specific": {
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{
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}
]
}
},
{
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],
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},
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"3.9.13-1ubuntu0.22.04.2",
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"3.9.27-0ubuntu0.2",
"3.9.27-0ubuntu0.5",
"3.9.27-0ubuntu0.6"
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},
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{
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"ecosystem": "Ubuntu:24.04:LTS"
},
"versions": [
"3.12.1-1",
"3.12.1-1ubuntu1",
"3.12.1-1ubuntu1.2",
"3.12.1-1ubuntu1.4",
"3.12.1-1ubuntu1.6",
"3.12.1-1ubuntu1.7"
],
"database_specific": {
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},
"ecosystem_specific": {
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{
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]
}
},
{
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{
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{
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}
]
}
],
"package": {
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"purl": "pkg:deb/ubuntu/rabbitmq-server?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"4.0.5-8ubuntu2",
"4.0.5-10ubuntu1",
"4.0.5-10ubuntu2",
"4.0.5-10ubuntu3",
"4.0.5-10ubuntu4",
"4.0.5-10ubuntu5",
"4.0.5-10ubuntu5.1",
"4.0.5-10ubuntu5.2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-67227.json"
},
"ecosystem_specific": {
"binaries": [
{
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"binary_version": "4.0.5-10ubuntu5.2"
}
]
}
}
],
"modified": "2026-10-22T10:30:15.655101823Z",
"provider": "osv",
"upstream": [
"CVE-2026-67227"
],
"references": [
"https://ubuntu.com/security/CVE-2026-67227",
"https://www.cve.org/CVERecord?id=CVE-2026-67227",
"https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-q7x8-97rh-cr24",
"https://github.com/rabbitmq/rabbitmq-server/commit/8fbe6d8112427e85fb9a9206b3eb6e9a3ddd3e39",
"https://github.com/rabbitmq/rabbitmq-server/commit/fc591e7ee27a29657ca960930acefd3e4217e007",
"https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.7",
"https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.3.1"
]
},
"related_cves": [
{
"value": "CVE-2026-67227",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 405410,
"published_at": "2026-09-25T17:17:00+00:00"
}