CVE-2026-57216 — Security Box Score

CVE · referencelatest edition

Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-57216CRITICAL

RabbitMQ: AMQP 1.0, AMQP 0-9-1, Stream Protocol loopback enforcement can lead to remote guest sessions due to listener-address loopback checks

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   N  C  H  H  H   10.0   .0050   41.0     —

AFFECTED
  Product          Versions             Fixed
  rabbitmq-server  >= 4.2.0, < 4.2.6 –  —

TIMELINE
  Jun 24  Reserved by GitHub_M
  Jul 10  EXPLOIT PUBLISHED — CVE-2026-57216 (rabbitmq-server). Public exploit reference added.
  Jul 10  Published (CNA: GitHub_M)

CWE-287 · CNA: GitHub_M · CVSS v3.1 · 6 references · NVD status: Analyzed

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
June 24, 2026	Reserved	Reserved by GitHub_M
July 10, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-57216 (rabbitmq-server). Public exploit reference added.
July 10, 2026	Published	Published (CNA: GitHub_M)

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
rabbitmq	rabbitmq-server	—	>= 4.2.0, < 4.2.6	—

Weaknesses

CWE-287

References (6)

https://github.com/rabbitmq/rabbitmq-server/commit/7273c9eb6920abcde17b892dbe97ccaf906ead47 [Patch]
https://github.com/rabbitmq/rabbitmq-server/commit/9f8c39fcf0acbc43080ee7017a62a02832114112 [Patch]
https://github.com/rabbitmq/rabbitmq-server/pull/15936 [Issue Tracking, Patch]
https://github.com/rabbitmq/rabbitmq-server/pull/15940 [Issue Tracking, Patch]
https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.6 [Release Notes]
https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-36m6-588r-vqcw [Exploit, Vendor Advisory]

Authoritative record: CVE-2026-57216 at cve.org

Vendors: rabbitmq

Weaknesses: CWE-287

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-57216 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.