CVE-2026-57217
MEDIUMRabbitMQ: Topic authorization can lead to cross-tenant routing-key bypass
Title source: cnaDescription
RabbitMQ is a messaging and streaming broker. Prior to 3.13.15, 4.0.21, 4.1.11, and 4.2.6, RabbitMQ topic authorization can allow restricted topic writes and binds during metadata-store failures because topic-permission lookup errors from Khepri can collapse to undefined, which the internal backend treats as allow. This issue is fixed in versions 3.13.15, 4.0.21, 4.1.11, and 4.2.6.
References (6)
Core 6
Core References
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https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-gpvw-75h5-3wvx
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https://github.com/rabbitmq/rabbitmq-server/pull/15941
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https://github.com/rabbitmq/rabbitmq-server/pull/15943
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https://github.com/rabbitmq/rabbitmq-server/commit/94f1d33a70fcfa09006649599e79fc92786a2d36
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https://github.com/rabbitmq/rabbitmq-server/commit/ce1f682aa6b398820c5e3ce1ff7435184027c82c
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https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.6
Scores
CVSS v3
6.5
EPSS
0.0027
EPSS Percentile
18.6%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
partial
Details
CWE
CWE-863
Status
published
Products (5)
broadcom/rabbitmq_server
3.13.0 - 4.2.6
rabbitmq/rabbitmq-server
>= 3.13.0, < 3.13.15
rabbitmq/rabbitmq-server
>= 4.0.0, < 4.0.21
rabbitmq/rabbitmq-server
>= 4.1.0, < 4.1.11
rabbitmq/rabbitmq-server
>= 4.2.0, < 4.2.6
Published
Jul 10, 2026
Tracked Since
Jul 11, 2026