CVE-2026-57220
HIGHRabbitMQ Stream Listener < 4.2.6 - Unauthenticated Memory Exhaustion
Title source: manualDescription
RabbitMQ is a messaging and streaming broker. Prior to 4.2.6, the RabbitMQ stream listener does not enforce the configured stream frame-size limit while assembling frames during authentication and before Tune negotiation, allowing an unauthenticated remote client to declare oversized frame lengths and consume broker memory in rabbit_stream_core. This issue is fixed in version 4.2.6.
References (6)
Core 6
Core References
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https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-f364-87q5-j35q
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https://github.com/rabbitmq/rabbitmq-server/pull/16171
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https://github.com/rabbitmq/rabbitmq-server/pull/16173
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https://github.com/rabbitmq/rabbitmq-server/commit/595ec28fa1621b1f2c28124e4e0466a8ad963547
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https://github.com/rabbitmq/rabbitmq-server/commit/773a49c4921e8be990262a2d609c35916825679e
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https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.6
Scores
CVSS v3
7.5
EPSS
0.0043
EPSS Percentile
34.6%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-770
Status
published
Products (2)
broadcom/rabbitmq_server
< 4.2.6
rabbitmq/rabbitmq-server
>= 4.2.0, < 4.2.6
Published
Jul 10, 2026
Tracked Since
Jul 11, 2026