HighFix available
rabbitmq-server — security advisory
RabbitMQ is a messaging and streaming broker. From 3.13.0 until 4.3.3, 4.2.9, 4.1.14, 4.0.23, and 3.13.18, JWKS Fetch Ignores HTTP Response Status Code - Signing Key Destruction Causes Authentication DoS (CWE-252). the JWKS key fetching mechanism in uaajwt.erl does not validate the HTTP response status code when downloading signing keys from the OAuth2 provider's JWKS endpoint. Non-200 responses (including 4xx and 5xx errors) are processed identically to successful responses. When the JWKS endpoint returns an error response with a valid-JSON body that lacks a keys field, all previously cached signing keys are destroyed, causing a persistent authentication denial of Files: deps/rabbitmqauthbackendoauth2/src/uaajwt.erl, lines 50-63 deps/rabbitmqauthbackendoauth2/src/uaajwks.erl, lines 5-7 deps/rabbitmqauthbackendoauth2/src/rabbitoauth2provider.erl, lines 98-107 Bug 1: HTTP status code ignored (uaajwt.erl:50-63): The Erlang httpc module returns {ok, {{HttpVersion, StatusCode, ReasonPhrase}, Headers, Body}}. The pattern {ok, {, , JwksBody}} matches ANY successful HTTP transaction Persistent authentication DoS: Once keys are destroyed, ALL OAuth2/JWT authentication fails for all users until a new successful JWKS refresh occurs Amplification: A single attacker can deny access to all legitimate OAuth2 users across the entire RabbitMQ. This issue is fixed in versions 4.3.3, 4.2.9, 4.1.14, 4.0.23, and 3.13.18.
- 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, 3.5.4-1, 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, 3.6.10-1, 3.6.10-1ubuntu0.1, 3.6.10-1ubuntu0.3, 3.6.10-1ubuntu0.4, 3.6.10-1ubuntu0.5, 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, 3.8.9-3ubuntu1, 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, 3.9.8-1, 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, 4.0.5-8ubuntu2, 4.3.2-4ubuntu2, 4.3.2-4ubuntu3
- Fixed versions
- 3.12.1-1ubuntu1.7, 3.5.7-1ubuntu0.16.04.4+esm3, 3.6.10-1ubuntu0.5+esm1, 3.8.3-0ubuntu0.3+esm2, 3.9.27-0ubuntu0.6, 4.0.5-10ubuntu5.2
- CVEs
- CVE-2026-67409
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 03:13 UTC · Revision 1
Source evidence
RabbitMQ is a messaging and streaming broker. From 3.13.0 until 4.3.3, 4.2.9, 4.1.14, 4.0.23, and 3.13.18, JWKS Fetch Ignores HTTP Response Status Code - Signing Key Destruction Causes Authentication DoS (CWE-252). the JWKS key fetching mechanism in uaajwt.erl does not validate the HTTP response status code when downloading signing keys from the OAuth2 provider's JWKS endpoint. Non-200 responses (including 4xx and 5xx errors) are processed identically to successful responses. When the JWKS endpoint returns an error response with a valid-JSON body that lacks a keys field, all previously cached signing keys are destroyed, causing a persistent authentication denial of Files: deps/rabbitmqauthbackendoauth2/src/uaajwt.erl, lines 50-63 deps/rabbitmqauthbackendoauth2/src/uaajwks.erl, lines 5-7 deps/rabbitmqauthbackendoauth2/src/rabbitoauth2provider.erl, lines 98-107 Bug 1: HTTP status code ignored (uaajwt.erl:50-63): The Erlang httpc module returns {ok, {{HttpVersion, StatusCode, ReasonPhrase}, Headers, Body}}. The pattern {ok, {, , JwksBody}} matches ANY successful HTTP transaction Persistent authentication DoS: Once keys are destroyed, ALL OAuth2/JWT authentication fails for all users until a new successful JWKS refresh occurs Amplification: A single attacker can deny access to all legitimate OAuth2 users across the entire RabbitMQ. This issue is fixed in versions 4.3.3, 4.2.9, 4.1.14, 4.0.23, and 3.13.18.
osv:UBUNTU-CVE-2026-67409
rabbitmq-server
Fixed versions: 3.5.7-1ubuntu0.16.04.4+esm3
rabbitmq-server
Fixed versions: 3.6.10-1ubuntu0.5+esm1
rabbitmq-server
Fixed versions: 3.8.3-0ubuntu0.3+esm2
rabbitmq-server
Fixed versions: 3.9.27-0ubuntu0.6
rabbitmq-server
Fixed versions: 3.12.1-1ubuntu1.7
rabbitmq-server
Fixed versions: Not specified
rabbitmq-server
Fixed versions: 4.0.5-10ubuntu5.2
Complete source record
{
"id": "874f089f8b343c01d1536a94e74af80add56471613f336b15e582ade88adcb96",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-67409",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-67409",
"summary": "RabbitMQ is a messaging and streaming broker. From 3.13.0 until 4.3.3, 4.2.9, 4.1.14, 4.0.23, and 3.13.18, JWKS Fetch Ignores HTTP Response Status Code - Signing Key Destruction Causes Authentication DoS (CWE-252). the JWKS key fetching mechanism in uaajwt.erl does not validate the HTTP response status code when downloading signing keys from the OAuth2 provider's JWKS endpoint. Non-200 responses (including 4xx and 5xx errors) are processed identically to successful responses. When the JWKS endpoint returns an error response with a valid-JSON body that lacks a keys field, all previously cached signing keys are destroyed, causing a persistent authentication denial of Files: deps/rabbitmqauthbackendoauth2/src/uaajwt.erl, lines 50-63 deps/rabbitmqauthbackendoauth2/src/uaajwks.erl, lines 5-7 deps/rabbitmqauthbackendoauth2/src/rabbitoauth2provider.erl, lines 98-107 Bug 1: HTTP status code ignored (uaajwt.erl:50-63): The Erlang httpc module returns {ok, {{HttpVersion, StatusCode, ReasonPhrase}, Headers, Body}}. The pattern {ok, {, , JwksBody}} matches ANY successful HTTP transaction Persistent authentication DoS: Once keys are destroyed, ALL OAuth2/JWT authentication fails for all users until a new successful JWKS refresh occurs Amplification: A single attacker can deny access to all legitimate OAuth2 users across the entire RabbitMQ. This issue is fixed in versions 4.3.3, 4.2.9, 4.1.14, 4.0.23, and 3.13.18.",
"evidence": "osv:UBUNTU-CVE-2026-67409",
"products": [
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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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"evidence": "/affected/0/versions"
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{
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{
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{
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{
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{
"name": {
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{
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"affected_versions": [
{
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"evidence": "/affected/1/versions"
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{
"value": "3.6.10-1ubuntu0.1",
"evidence": "/affected/1/versions"
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{
"value": "3.6.10-1ubuntu0.3",
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{
"value": "3.6.10-1ubuntu0.4",
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{
"value": "3.6.10-1ubuntu0.5",
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{
"name": {
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{
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],
"affected_versions": [
{
"value": "3.7.8-4ubuntu2",
"evidence": "/affected/2/versions"
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{
"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"
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{
"value": "3.8.3-0ubuntu0.1",
"evidence": "/affected/2/versions"
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{
"value": "3.8.3-0ubuntu0.2",
"evidence": "/affected/2/versions"
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{
"value": "3.8.3-0ubuntu0.3",
"evidence": "/affected/2/versions"
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{
"value": "3.8.3-0ubuntu0.3+esm1",
"evidence": "/affected/2/versions"
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{
"name": {
"value": "rabbitmq-server",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.9.27-0ubuntu0.6",
"evidence": "/affected/3/ranges"
}
],
"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"
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{
"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"
}
]
},
{
"name": {
"value": "rabbitmq-server",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.12.1-1ubuntu1.7",
"evidence": "/affected/4/ranges"
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],
"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"
}
]
},
{
"name": {
"value": "rabbitmq-server",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "4.0.5-10ubuntu5",
"evidence": "/affected/5/versions"
},
{
"value": "4.3.2-4ubuntu2",
"evidence": "/affected/5/versions"
},
{
"value": "4.3.2-4ubuntu3",
"evidence": "/affected/5/versions"
}
]
},
{
"name": {
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},
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{
"value": "4.0.5-10ubuntu5.2",
"evidence": "/affected/6/ranges"
}
],
"affected_versions": [
{
"value": "4.0.5-8ubuntu2",
"evidence": "/affected/6/versions"
},
{
"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"
}
]
}
],
"severity": "high",
"structured": {
"id": "UBUNTU-CVE-2026-67409",
"aliases": [
"UBUNTU-CVE-2026-67409"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/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"
},
{
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}
]
}
],
"package": {
"name": "rabbitmq-server",
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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"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-67409.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "rabbitmq-server",
"binary_version": "3.5.7-1ubuntu0.16.04.4+esm3"
}
],
"availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.6.10-1ubuntu0.5+esm1"
}
]
}
],
"package": {
"name": "rabbitmq-server",
"purl": "pkg:deb/ubuntu/rabbitmq-server?arch=source&distro=esm-infra%2Fbionic",
"ecosystem": "Ubuntu:Pro:18.04:LTS"
},
"versions": [
"3.6.10-1",
"3.6.10-1ubuntu0.1",
"3.6.10-1ubuntu0.3",
"3.6.10-1ubuntu0.4",
"3.6.10-1ubuntu0.5"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-67409.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "rabbitmq-server",
"binary_version": "3.6.10-1ubuntu0.5+esm1"
}
],
"availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.8.3-0ubuntu0.3+esm2"
}
]
}
],
"package": {
"name": "rabbitmq-server",
"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"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-67409.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "rabbitmq-server",
"binary_version": "3.8.3-0ubuntu0.3+esm2"
}
],
"availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
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{
"introduced": "0"
},
{
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}
]
}
],
"package": {
"name": "rabbitmq-server",
"purl": "pkg:deb/ubuntu/rabbitmq-server?arch=source&distro=jammy",
"ecosystem": "Ubuntu:22.04:LTS"
},
"versions": [
"3.8.9-3ubuntu1",
"3.9.8-1",
"3.9.8-2",
"3.9.8-3",
"3.9.8-5",
"3.9.8-6",
"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"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-67409.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "rabbitmq-server",
"binary_version": "3.9.27-0ubuntu0.6"
}
],
"availability": "No subscription required"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.12.1-1ubuntu1.7"
}
]
}
],
"package": {
"name": "rabbitmq-server",
"purl": "pkg:deb/ubuntu/rabbitmq-server?arch=source&distro=noble",
"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"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-67409.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "rabbitmq-server",
"binary_version": "3.12.1-1ubuntu1.7"
}
],
"availability": "No subscription required"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "rabbitmq-server",
"purl": "pkg:deb/ubuntu/rabbitmq-server?arch=source&distro=stonking",
"ecosystem": "Ubuntu:26.10"
},
"versions": [
"4.0.5-10ubuntu5",
"4.3.2-4ubuntu2",
"4.3.2-4ubuntu3"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-67409.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "rabbitmq-server",
"binary_version": "4.3.2-4ubuntu3"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "4.0.5-10ubuntu5.2"
}
]
}
],
"package": {
"name": "rabbitmq-server",
"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"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-67409.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "rabbitmq-server",
"binary_version": "4.0.5-10ubuntu5.2"
}
],
"availability": "No subscription required"
}
}
],
"modified": "2026-10-17T13:00:39.214643018Z",
"provider": "osv",
"upstream": [
"CVE-2026-67409"
],
"references": [
"https://ubuntu.com/security/CVE-2026-67409",
"https://www.cve.org/CVERecord?id=CVE-2026-67409",
"https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-qw3h-qqm9-jrw8",
"https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.9",
"https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.3.3",
"https://ubuntu.com/security/notices/USN-8933-1"
]
},
"related_cves": [
{
"value": "CVE-2026-67409",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 360757,
"published_at": "2026-09-25T17:17:00+00:00"
}