CVE-2026-66080
RabbitMQ: Super-stream partitions unbounded allocation
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
RabbitMQ is a messaging and streaming broker. Prior to versions 4.1.11, 4.2.6, and 4.3.0, validate_partitions only checks that the requested partition count is at least 1, with no upper bound. A large count such as lists:seq(0, 500000000) allocates roughly 8GB. Preconditions include The rabbitmq_stream_management plugin must be enabled. The caller needs the management tag and access to the target vhost.. This issue is fixed in versions 4.1.11, 4.2.6, and 4.3.0.
| CWE | CWE-770 |
| Vendor | rabbitmq |
| Product | rabbitmq-server |
| Published | Sep 23, 2026 |
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Affected Versions
rabbitmq / rabbitmq-server
>= 4.1.0, < 4.1.11 >= 4.2.0, < 4.2.6