CVE-2026-66072
RabbitMQ: Atom table exhaustion via stream `chunk_selector`
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-400 |
| Vendor | rabbitmq |
| Product | rabbitmq-server |
| Published | Sep 23, 2026 |
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Affected Versions
rabbitmq / rabbitmq-server
>= 3.13.0, < 3.13.15 >= 4.0.0, < 4.0.20 >= 4.1.0, < 4.1.11 >= 4.2.0, < 4.2.6 >= 4.3.0, < 4.3.1