Medium
rabbitmq-server — security advisory
RabbitMQ is a messaging and streaming broker. Prior to versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.0, match_value/3 passes the user-supplied ?name= regular expression to re:run with no match_limit option, and executes it once per resource in the result set. OTP's default 10M match_limit caps each call at roughly 100-200ms, but the regex runs once per resource in the result set. With a large set, for example 5000 queues at 150ms each, a single request consumes 12 or more minutes of CPU. Parallel requests saturate the schedulers. The use_regex=true option is a supported feature on list endpoints, so this path is reachable through normal API use. Preconditions include Any user with the management tag can exploit this.. This issue is fixed in versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.0.
- 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-2026-66074
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 17:58 UTC · Revision 1
Source evidence
RabbitMQ is a messaging and streaming broker. Prior to versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.0, match_value/3 passes the user-supplied ?name= regular expression to re:run with no match_limit option, and executes it once per resource in the result set. OTP's default 10M match_limit caps each call at roughly 100-200ms, but the regex runs once per resource in the result set. With a large set, for example 5000 queues at 150ms each, a single request consumes 12 or more minutes of CPU. Parallel requests saturate the schedulers. The use_regex=true option is a supported feature on list endpoints, so this path is reachable through normal API use. Preconditions include Any user with the management tag can exploit this.. This issue is fixed in versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.0.
osv:UBUNTU-CVE-2026-66074
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": "24865a71d80174e7eb6ac418f5d3a0a1a7249acadf5f1699980e4992e97b13ab",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-66074",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-66074",
"summary": "RabbitMQ is a messaging and streaming broker. Prior to versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.0, match_value/3 passes the user-supplied ?name= regular expression to re:run with no match_limit option, and executes it once per resource in the result set. OTP's default 10M match_limit caps each call at roughly 100-200ms, but the regex runs once per resource in the result set. With a large set, for example 5000 queues at 150ms each, a single request consumes 12 or more minutes of CPU. Parallel requests saturate the schedulers. The use_regex=true option is a supported feature on list endpoints, so this path is reachable through normal API use. Preconditions include Any user with the management tag can exploit this.. This issue is fixed in versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.0.",
"evidence": "osv:UBUNTU-CVE-2026-66074",
"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",
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}
]
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{
"name": {
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},
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"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"
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{
"value": "3.6.10-1ubuntu0.4",
"evidence": "/affected/1/versions"
},
{
"value": "3.6.10-1ubuntu0.5",
"evidence": "/affected/1/versions"
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{
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]
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{
"name": {
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{
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{
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"evidence": "/affected/2/versions"
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{
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"evidence": "/affected/2/versions"
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{
"value": "3.8.2-0ubuntu1.2",
"evidence": "/affected/2/versions"
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{
"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": [],
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"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-2026-66074",
"aliases": [
"UBUNTU-CVE-2026-66074"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "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"
},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
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"purl": "pkg:deb/ubuntu/rabbitmq-server?arch=source&distro=esm-infra-legacy%2Fxenial",
"ecosystem": "Ubuntu:Pro:16.04:LTS"
},
"versions": [
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"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-2026-66074.json"
},
"ecosystem_specific": {
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}
]
}
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{
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"purl": "pkg:deb/ubuntu/rabbitmq-server?arch=source&distro=esm-infra%2Fbionic",
"ecosystem": "Ubuntu:Pro:18.04:LTS"
},
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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": {
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},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "rabbitmq-server",
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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",
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},
"versions": [
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"3.7.18-1",
"3.8.2-0ubuntu1",
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"3.8.2-0ubuntu1.2",
"3.8.2-0ubuntu1.3",
"3.8.2-0ubuntu1.4",
"3.8.2-0ubuntu1.5",
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"3.8.3-0ubuntu0.2",
"3.8.3-0ubuntu0.3",
"3.8.3-0ubuntu0.3+esm1",
"3.8.3-0ubuntu0.3+esm2"
],
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},
"ecosystem_specific": {
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{
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},
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"3.9.8-5",
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"3.9.13-1ubuntu0.22.04.2",
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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"
],
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},
"ecosystem_specific": {
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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": {
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},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "rabbitmq-server",
"binary_version": "4.0.5-10ubuntu5.2"
}
]
}
}
],
"modified": "2026-10-22T10:30:09.800441805Z",
"provider": "osv",
"upstream": [
"CVE-2026-66074"
],
"references": [
"https://ubuntu.com/security/CVE-2026-66074",
"https://www.cve.org/CVERecord?id=CVE-2026-66074",
"https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-rg5q-vcgf-rfh7",
"https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.6",
"https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.3.0"
]
},
"related_cves": [
{
"value": "CVE-2026-66074",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/1/score"
},
"source_id": "core-osv",
"document_id": 405379,
"published_at": "2026-09-23T21:16:00+00:00"
}