CVE-2026-66080
5.9
CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| rabbitmq | rabbitmq-server | >= 4.1.0, < 4.1.11 | affected |
| rabbitmq | rabbitmq-server | >= 4.2.0, < 4.2.6 | affected |
Weaknesses
- CWE-770: CWE-770: Allocation of Resources Without Limits or Throttling
References
- https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-wg79-5449-m728
- https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.6
- https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.3.0
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