Critical
rabbitmq-server — security advisory
RabbitMQ is a messaging and streaming broker. Prior to 3.13.15, 4.0.20, 4.1.11, and 4.2.6, AMQP 0-9-1, AMQP 1.0, and Stream Protocol authentication can allow a loopback-restricted user such as guest to connect remotely when traffic is accepted through a trusted PROXY-protocol path and the backend listener is loopback-bound because the loopback check uses the listener-side socket address instead of the real client source. This issue is fixed in versions 3.13.15, 4.0.20, 4.1.11, and 4.2.6.
- 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, 4.3.2-4ubuntu2, 4.3.2-4ubuntu3
- Fixed versions
- Not specified
- CVEs
- CVE-2026-57216
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 02:47 UTC · Revision 1
Source evidence
RabbitMQ is a messaging and streaming broker. Prior to 3.13.15, 4.0.20, 4.1.11, and 4.2.6, AMQP 0-9-1, AMQP 1.0, and Stream Protocol authentication can allow a loopback-restricted user such as guest to connect remotely when traffic is accepted through a trusted PROXY-protocol path and the backend listener is loopback-bound because the loopback check uses the listener-side socket address instead of the real client source. This issue is fixed in versions 3.13.15, 4.0.20, 4.1.11, and 4.2.6.
osv:UBUNTU-CVE-2026-57216
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
rabbitmq-server
Fixed versions: Not specified
Complete source record
{
"id": "41eb9861f564f0e5bcc9407366cdd068c049388b03a1a4f8ebb73eebb49ceebf",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-57216",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-57216",
"summary": "RabbitMQ is a messaging and streaming broker. Prior to 3.13.15, 4.0.20, 4.1.11, and 4.2.6, AMQP 0-9-1, AMQP 1.0, and Stream Protocol authentication can allow a loopback-restricted user such as guest to connect remotely when traffic is accepted through a trusted PROXY-protocol path and the backend listener is loopback-bound because the loopback check uses the listener-side socket address instead of the real client source. This issue is fixed in versions 3.13.15, 4.0.20, 4.1.11, and 4.2.6.",
"evidence": "osv:UBUNTU-CVE-2026-57216",
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{
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{
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"evidence": "/affected/0/versions"
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{
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{
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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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{
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{
"name": {
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"evidence": "/affected/3/package/name"
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{
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},
{
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"evidence": "/affected/3/versions"
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{
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{
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{
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{
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{
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"evidence": "/affected/3/versions"
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{
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{
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{
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{
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"evidence": "/affected/4/versions"
},
{
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"evidence": "/affected/4/versions"
},
{
"value": "3.12.1-1ubuntu1.4",
"evidence": "/affected/4/versions"
},
{
"value": "3.12.1-1ubuntu1.6",
"evidence": "/affected/4/versions"
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{
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"evidence": "/affected/4/versions"
}
]
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{
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{
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{
"value": "4.0.5-10ubuntu2",
"evidence": "/affected/6/versions"
},
{
"value": "4.0.5-10ubuntu3",
"evidence": "/affected/6/versions"
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{
"value": "4.0.5-10ubuntu4",
"evidence": "/affected/6/versions"
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{
"value": "4.0.5-10ubuntu5",
"evidence": "/affected/6/versions"
},
{
"value": "4.0.5-10ubuntu5.1",
"evidence": "/affected/6/versions"
},
{
"value": "4.0.5-10ubuntu5.2",
"evidence": "/affected/6/versions"
}
]
}
],
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"structured": {
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"aliases": [
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],
"metrics": [
{
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"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N"
},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
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"events": [
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"package": {
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"ecosystem": "Ubuntu:Pro:16.04:LTS"
},
"versions": [
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"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",
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"3.8.3-0ubuntu0.3+esm2"
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},
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"purl": "pkg:deb/ubuntu/rabbitmq-server?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
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"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": [
{
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]
}
}
],
"modified": "2026-10-17T12:59:11.946121034Z",
"provider": "osv",
"upstream": [
"CVE-2026-57216"
],
"references": [
"https://ubuntu.com/security/CVE-2026-57216",
"https://www.cve.org/CVERecord?id=CVE-2026-57216",
"https://github.com/rabbitmq/rabbitmq-server/commit/7273c9eb6920abcde17b892dbe97ccaf906ead47",
"https://github.com/rabbitmq/rabbitmq-server/commit/9f8c39fcf0acbc43080ee7017a62a02832114112",
"https://github.com/rabbitmq/rabbitmq-server/pull/15936",
"https://github.com/rabbitmq/rabbitmq-server/pull/15940",
"https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.6",
"https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-36m6-588r-vqcw"
]
},
"related_cves": [
{
"value": "CVE-2026-57216",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/1/score"
},
"source_id": "core-osv",
"document_id": 359416,
"published_at": "2026-07-10T21:16:00+00:00"
}