CVE-2026-57220

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.

CVSS 3.1

7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS

0.5% chance of exploitation in the next 30 days; higher than 45% of CVEs (scores of 2026-10-25)

CWE

CWE-770

Published

2026-07-10

Modified

2026-10-25

Record from

the NVD, synced 2026-10-25

Affected

• broadcom:rabbitmq_server

References

• https://github.com/rabbitmq/rabbitmq-server/commit/595ec28fa1621b1f2c28124e4e0466a8ad963547
• https://github.com/rabbitmq/rabbitmq-server/commit/773a49c4921e8be990262a2d609c35916825679e
• https://github.com/rabbitmq/rabbitmq-server/pull/16171
• https://github.com/rabbitmq/rabbitmq-server/pull/16173
• https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.6

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