Resource Exhaustion Affecting rabbitmq-server package, versions <4.3.0-2


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.39% (33rd percentile)

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  • Snyk IDSNYK-DEBIAN14-RABBITMQSERVER-20128136
  • published25 Sept 2026
  • disclosed23 Sept 2026

Introduced: 23 Sep 2026

CVE-2026-67229  (opens in a new tab)
CWE-400  (opens in a new tab)

How to fix?

Upgrade Debian:14 rabbitmq-server to version 4.3.0-2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream rabbitmq-server package and not the rabbitmq-server package as distributed by Debian. See How to fix? for Debian:14 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1