High
rabbitmq-server — security advisory
RabbitMQ is a messaging and streaming broker. Prior to 4.3.5, an authenticated user who can bind a queue to a topic exchange and publish to it can use consecutive # segments in a binding key to make both topic matchers revisit the same trie-node and routing-key-suffix states without memoization. The matcher materializes duplicate destinations before deduplication, causing combinatorial CPU work and memory pressure that can disrupt routing for all tenants. This vulnerability is fixed in 4.3.5.
- 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-2026-67419
- 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. Prior to 4.3.5, an authenticated user who can bind a queue to a topic exchange and publish to it can use consecutive # segments in a binding key to make both topic matchers revisit the same trie-node and routing-key-suffix states without memoization. The matcher materializes duplicate destinations before deduplication, causing combinatorial CPU work and memory pressure that can disrupt routing for all tenants. This vulnerability is fixed in 4.3.5.
osv:UBUNTU-CVE-2026-67419
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": "6b79ae325de108e1a4ceae7e4d3b281c4af671658af1dcbcd3fd28d423ce4c33",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-67419",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-67419",
"summary": "RabbitMQ is a messaging and streaming broker. Prior to 4.3.5, an authenticated user who can bind a queue to a topic exchange and publish to it can use consecutive # segments in a binding key to make both topic matchers revisit the same trie-node and routing-key-suffix states without memoization. The matcher materializes duplicate destinations before deduplication, causing combinatorial CPU work and memory pressure that can disrupt routing for all tenants. This vulnerability is fixed in 4.3.5.",
"evidence": "osv:UBUNTU-CVE-2026-67419",
"products": [
{
"name": {
"value": "rabbitmq-server",
"evidence": "/affected/0/package/name"
},
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"affected_versions": [
{
"value": "3.5.4-1",
"evidence": "/affected/0/versions"
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{
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"evidence": "/affected/0/versions"
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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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"evidence": "/affected/0/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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{
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{
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{
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{
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{
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{
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{
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{
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{
"value": "3.8.3-0ubuntu0.3",
"evidence": "/affected/2/versions"
},
{
"value": "3.8.3-0ubuntu0.3+esm1",
"evidence": "/affected/2/versions"
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{
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"evidence": "/affected/2/versions"
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]
},
{
"name": {
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"evidence": "/affected/3/package/name"
},
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{
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"evidence": "/affected/3/versions"
},
{
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"evidence": "/affected/3/versions"
},
{
"value": "3.9.8-2",
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{
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},
{
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"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"
},
{
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},
{
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]
},
{
"name": {
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"evidence": "/affected/4/package/name"
},
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{
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"evidence": "/affected/4/versions"
},
{
"value": "3.12.1-1ubuntu1",
"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"
},
{
"value": "3.12.1-1ubuntu1.7",
"evidence": "/affected/4/versions"
}
]
},
{
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},
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{
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},
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{
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},
{
"value": "4.0.5-10ubuntu1",
"evidence": "/affected/6/versions"
},
{
"value": "4.0.5-10ubuntu2",
"evidence": "/affected/6/versions"
},
{
"value": "4.0.5-10ubuntu3",
"evidence": "/affected/6/versions"
},
{
"value": "4.0.5-10ubuntu4",
"evidence": "/affected/6/versions"
},
{
"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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}
],
"severity": "high",
"structured": {
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"aliases": [
"UBUNTU-CVE-2026-67419"
],
"metrics": [
{
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},
{
"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": [
{
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"type": "ECOSYSTEM",
"events": [
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],
"package": {
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"ecosystem": "Ubuntu:Pro:16.04:LTS"
},
"versions": [
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"3.5.4-3",
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"3.5.7-1ubuntu0.16.04.2",
"3.5.7-1ubuntu0.16.04.4",
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"3.5.7-1ubuntu0.16.04.4+esm2",
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],
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},
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"3.8.3-0ubuntu0.3+esm2"
],
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},
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{
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"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
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],
"database_specific": {
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},
"ecosystem_specific": {
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{
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}
],
"modified": "2026-10-22T10:30:10.525928431Z",
"provider": "osv",
"upstream": [
"CVE-2026-67419"
],
"references": [
"https://ubuntu.com/security/CVE-2026-67419",
"https://www.cve.org/CVERecord?id=CVE-2026-67419",
"https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-h964-v5mf-22cq",
"https://github.com/rabbitmq/rabbitmq-server/commit/c5ed7c4e97e02be688730803604cc7a88dbe4864",
"https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.3.5"
]
},
"related_cves": [
{
"value": "CVE-2026-67419",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 405389,
"published_at": "2026-09-25T17:17:00+00:00"
}