CVE-2026-67229
CVSS:4.0/AV:N/AC:L/AT:N/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 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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| rabbitmq | rabbitmq-server | >= 3.13.0, < 3.13.15 | affected |
| rabbitmq | rabbitmq-server | >= 4.0.0, < 4.0.20 | affected |
| rabbitmq | rabbitmq-server | >= 4.1.0, < 4.1.11 | affected |
| rabbitmq | rabbitmq-server | >= 4.2.0, < 4.2.6 | affected |
Weaknesses
- CWE-400: CWE-400: Uncontrolled Resource Consumption
References
- https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-ggrw-qm45-hwpv
- 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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