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CVE-2026-67229

RabbitMQ: Admin-only atom exhaustion: atomize_keys on vhost metadata PUBLISHED

Description (CNA)

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 (CNA)

Vendor / productVersions
rabbitmq / rabbitmq-serveraffected >= 3.13.0, < 3.13.15; affected >= 4.0.0, < 4.0.20; affected >= 4.1.0, < 4.1.11; affected >= 4.2.0, < 4.2.6

CWE

CWE-400

References

ADP enrichment

CISA-ADP

No English description supplied.