CVE-2026-66072

RabbitMQ: Atom table exhaustion via stream `chunk_selector`

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 4.3.1, get_chunk_selector/1 calls binary_to_atom on the raw client-supplied <<"chunk_selector">> property from post-auth subscribe and resolve_offset_spec frames, with no whitelist and no existing guard. An authenticated stream client with read access to any stream can crash the broker node. Preconditions include rabbitmq_stream plugin enabled Authenticated stream-protocol user with read access to at least one stream. This issue is fixed in versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.1.

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/security/advisories/GHSA-48hm-chgv-398r

github.com

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

github.com

https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.3.1

github.com

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