CVE-2026-57220
RabbitMQ: Stream listener does not enforce configured frame-size limit during authentication, permitting unauth'd mem-exhaust DoS
CVSS Score
7.5
EPSS Score
0.4%
EPSS Percentile
35th
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.
| CWE | CWE-770 |
| Vendor | rabbitmq |
| Product | rabbitmq-server |
| Published | Jul 10, 2026 |
| Last Updated | Jul 13, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
rabbitmq / rabbitmq-server
>= 4.2.0, < 4.2.6
References
github.com: https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-f364-87q5-j35q github.com: https://github.com/rabbitmq/rabbitmq-server/pull/16171 github.com: https://github.com/rabbitmq/rabbitmq-server/pull/16173 github.com: https://github.com/rabbitmq/rabbitmq-server/commit/595ec28fa1621b1f2c28124e4e0466a8ad963547 github.com: https://github.com/rabbitmq/rabbitmq-server/commit/773a49c4921e8be990262a2d609c35916825679e github.com: https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.6