RabbitMQ is a messaging and streaming broker. From 4.0.0 until 4.0.22 and 4.1.14 and 4.2.7, Admin-only atom exhaustion: PUT /api/users tags list. settags/2 maps rabbitdatacoercion:toatom/1 over the user's tags list. The 20 MB management body limit fits ~3-4M short tag strings. An administrator can crash the node in a single request by creating a user (or importing definitions) with ~1M unique tag administrator. This issue is fixed in versions 4.0.22 and 4.1.14 and 4.2.7.
Metrics
Affected Vendors & Products
References
History
Tue, 20 Oct 2026 13:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Broadcom
Broadcom rabbitmq Server |
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| CPEs | cpe:2.3:a:broadcom:rabbitmq_server:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Broadcom
Broadcom rabbitmq Server |
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| Metrics |
cvssV3_1
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Sat, 26 Sep 2026 11:30:00 +0000
| Type | Values Removed | Values Added |
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| First Time appeared |
Rabbitmq
Rabbitmq rabbitmq-server |
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| Vendors & Products |
Rabbitmq
Rabbitmq rabbitmq-server |
Fri, 25 Sep 2026 21:30:00 +0000
| Type | Values Removed | Values Added |
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| Metrics |
ssvc
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Fri, 25 Sep 2026 16:45:00 +0000
| Type | Values Removed | Values Added |
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| Description | RabbitMQ is a messaging and streaming broker. From 4.0.0 until 4.0.22 and 4.1.14 and 4.2.7, Admin-only atom exhaustion: PUT /api/users tags list. settags/2 maps rabbitdatacoercion:toatom/1 over the user's tags list. The 20 MB management body limit fits ~3-4M short tag strings. An administrator can crash the node in a single request by creating a user (or importing definitions) with ~1M unique tag administrator. This issue is fixed in versions 4.0.22 and 4.1.14 and 4.2.7. | |
| Title | RabbitMQ: Admin-only atom exhaustion: PUT /api/users tags list | |
| Weaknesses | CWE-400 | |
| References |
| |
| Metrics |
cvssV4_0
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Status: PUBLISHED
Assigner: GitHub_M
Published: 2026-09-25T16:29:13.662Z
Updated: 2026-09-25T19:55:13.807Z
Reserved: 2026-07-28T19:50:39.437Z
Link: CVE-2026-67226
Updated: 2026-09-25T19:54:50.562Z
Status : Analyzed
Published: 2026-09-25T17:17:11.000
Modified: 2026-10-20T13:36:07.600
Link: CVE-2026-67226
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