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CVE-2026-57220

Broadcom Rabbitmq Server denial of service

7.5 HIGHPublic exploitEPSS 0.55%
  1. Published10 Jul 2026

Description

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 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

Broadcom Rabbitmq Server≥ 4.2.0 < 4.2.6

Remediation

Fixed in
Broadcom Rabbitmq Server≥ 4.2.6

References

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Frequently asked

Is CVE-2026-57220 being actively exploited?

CVE-2026-57220 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.55%.

How severe is CVE-2026-57220?

CVE-2026-57220 has a CVSS 3.1 base score of 7.5, rated high. EPSS estimates a 0.55% probability of exploitation.

Which products are affected by CVE-2026-57220?

Affected products include Broadcom Rabbitmq Server.

How do I fix CVE-2026-57220?

Upgrade affected software to a fixed version, for example Broadcom Rabbitmq Server 4.2.6 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.