CVE-2026-67229

RabbitMQ: Admin-only atom exhaustion: atomize_keys on vhost metadata

Published: Sep 23, 2026Updated: Sep 23, 2026 Sources: CVE List NVDCWE-400

N/ACVSS

NVD MITRE

Description

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.

No summary for this CVE yet.

Weaknesses

CWE-400

Affected Products

rabbitmq

oss-project·GBaka rabbitmq-server

rabbitmq-serverOn-prem

Databases / cache-message-queue

Exploitability

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References

https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.6

github.com

https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.3.0

github.com

https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-ggrw-qm45-hwpv

github.com

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