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CVE-2026-57220

7.5 · HIGH

RabbitMQ is a messaging and streaming broker.

Published Jul 10, 2026CWE-770EPSS 0.55%

Overview

CVE-2026-57220 is a high-severity vulnerability. It was published on July 10, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/rabbitmq/rabbitmq-server/commit/595ec28fa1621b1f2c28124e4e0466a8ad963547GitHubgithub.com/rabbitmq/rabbitmq-server/commit/773a49c4921e8be990262a2d609c35916825679eGitHubgithub.com/rabbitmq/rabbitmq-server/pull/16171GitHubgithub.com/rabbitmq/rabbitmq-server/pull/16173GitHubgithub.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.6GitHubgithub.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-f364-87q5-j35qGitHubgithub.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-f364-87q5-j35q

How CyberStrike helps

Frequently asked questions

What is CVE-2026-57220?

CVE-2026-57220 is a high-severity vulnerability. It was published on July 10, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-57220?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-57220?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-57220?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-57220 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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