CVE-2026-67229
published 2026-09-23CVE-2026-67229: 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, add_vhost/2 calls…
PriorityP426medium4.9CVSS 3.1
AVNACLPRHUINSUCNINAH
EPSS
0.32%
23.3th percentile
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, add_vhost/2 calls rabbit_data_coercion:atomize_keys/1 (the unsafe variant using binary_to_atom) on the vhost metadata map. The 20 MB management body limit fits ~1M+ short keys. Admin-only. An administrator importing a crafted definitions file can crash the node in a single request: a vhosts entry with ~1M unique metadata keys exhausts the atom table during import. Preconditions include administrator tag. This issue is fixed in versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.0.
Affected
8 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| broadcom | rabbitmq_server | >= 3.13.0 < 3.13.15 | 3.13.15 |
| broadcom | rabbitmq_server | >= 4.0.0 < 4.0.20 | 4.0.20 |
| broadcom | rabbitmq_server | >= 4.1.0 < 4.1.11 | 4.1.11 |
| broadcom | rabbitmq_server | >= 4.2.0 < 4.2.6 | 4.2.6 |
| rabbitmq | rabbitmq-server | — | — |
| rabbitmq | rabbitmq-server | — | — |
| rabbitmq | rabbitmq-server | — | — |
| rabbitmq | rabbitmq-server | — | — |
CVSS provenance
nvdv3.14.9MEDIUMCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
nvdv4.06.9MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vendor_redhat6.9MEDIUM
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VulDB
RabbitMQ up to 3.13.14/4.0.19/4.1.10/4.2.5 Data Coercion rabbit_data_coercion:atomize_keys resource consumption
vuldb·2026-09-23·CVSS 6.9
CVE-2026-67229 [MEDIUM] RabbitMQ up to 3.13.14/4.0.19/4.1.10/4.2.5 Data Coercion rabbit_data_coercion:atomize_keys resource consumption
A vulnerability was found in RabbitMQ up to 3.13.14/4.0.19/4.1.10/4.2.5. It has been declared as problematic. This issue affects the function rabbit_data_coercion:atomize_keys of the component Data Coercion. Such manipulation leads to resource consumption.
This vulnerability is documented as CVE-2026-67229. The attack can be executed remotely. There is not any exploit available.
It is recommended to upgrade the affected component.
Red Hat
RabbitMQ: RabbitMQ: Denial of Service via admin-only atom exhaustion from crafted vhost metadata
vendor_redhat·2026-09-23·CVSS 6.9
CVE-2026-67229 [MEDIUM] CWE-770 RabbitMQ: RabbitMQ: Denial of Service via admin-only atom exhaustion from crafted vhost metadata
RabbitMQ: RabbitMQ: Denial of Service via admin-only atom exhaustion from crafted vhost metadata
A flaw was found in RabbitMQ, a messaging and streaming broker. An administrator with appropriate privileges can trigger a Denial of Service (DoS) by importing a specially crafted definitions file. This file, containing a large number of unique metadata keys, causes the system to exhaust its atom table, leading to a node crash.
Package: rabbitmq-server4.2 (Red Hat Hardened Images) - Will not fix
Package: rabbitmq-server4.3 (Red Hat Hardened Images) - Affected
No detection rules found.
No public exploits indexed.
2026-09-23
Published