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Vulnerabilities / CVE-2026-57216

critical

CVE-2026-57216

rabbitmq: RabbitMQ: Authentication bypass allows remote connection for loopback-restricted users via incorrect loopback check

Published Modified CWE 287
In the Trivy database since at least 24 Oct 2026, 07:11 UTCWhen it arrived before that build is not recorded.

Severity by source

NVD10.0CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Red Hat6.3CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N

Trivy's own label is CRITICAL. Rated critical by NVD, Photon OS. Rated lower by Red Hat (medium), Azure Linux (medium).

Description

RabbitMQ is a messaging and streaming broker. Prior to 3.13.15, 4.0.20, 4.1.11, and 4.2.6, AMQP 0-9-1, AMQP 1.0, and Stream Protocol authentication can allow a loopback-restricted user such as guest to connect remotely when traffic is accepted through a trusted PROXY-protocol path and the backend listener is loopback-bound because the loopback check uses the listener-side socket address instead of the real client source. This issue is fixed in versions 3.13.15, 4.0.20, 4.1.11, and 4.2.6.

Affected packages and fixed versions

SourcePackageFixed in
Photon OS 5.0rabbitmq-server4.2.9-1.ph5
Azure Linux 3.0rabbitmq-server0:3.13.7-7.azl3
debian 11rabbitmq-serverno fix listed
debian 12rabbitmq-serverno fix listed
debian 13rabbitmq-serverno fix listed
debian 14rabbitmq-server4.3.0-2
echorabbitmq-serverno fix listed
rapidfort debian 12rabbitmq-server0:4.3.0-2
rapidfort debian 13rabbitmq-server0:4.3.0-2

References

All 9 references

Vulnerability data compiled from the Trivy vulnerability database (trivy-db, Aqua Security, Apache License 2.0), which aggregates third-party advisories. CVE records are published by The MITRE Corporation under the CVE Terms of Use; CVE is a trademark of MITRE. This product uses data from the NVD API but is not endorsed or certified by the NVD. Severity, titles and advisory data from the GitHub Advisory Database (CC BY 4.0), Red Hat security data (CC BY 4.0) and the other sources linked on each entry. Entries may be summarised or re-formatted; the linked original is the authoritative record.