CVE-2026-57216: RabbitMQ: AMQP 1.0, AMQP 0-9-1, Stream Protocol loopback enforcement can lead to remote guest sessions due to listener-address loopback checks

mediumCVSS 6.8CVE-2026-57216

CSIRTS triage

vendor: RabbitMQ product: RabbitMQOther

What: Loopback enforcement can lead to remote guest sessions due to listener-address loopback checks.
Who is affected: Deployments of RabbitMQ with AMQP 1.0, AMQP 0-9-1, Stream Protocol.
Urgency: Remediation is necessary due to the medium severity and potential for unauthorized access.
Action: Update RabbitMQ to the latest version to address the vulnerability.

AI-assisted analysis generated from the source advisory — verify against the original.

⚡ Watch RabbitMQ

Get an email when a new RabbitMQ advisory drops — max one per day, one-click unsubscribe.

Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: medium — CVSS 6.8
Published: 2026-07-14
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-57216

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-572160.50% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 40% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-57216	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for RabbitMQ

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

medium[UPDATE] [medium] RabbitMQ: Multiple Vulnerabilitiescert-bund · 2026-07-31
medium[NEW] [medium] RabbitMQ: Multiple vulnerabilitiescert-bund · 2026-07-24
medium[NEW] [medium] RabbitMQ: Multiple vulnerabilitiescert-bund · 2026-07-23
high[UPDATE] [high] RabbitMQ: Multiple vulnerabilitiescert-bund · 2026-07-14
medium[UPDATE] [medium] RabbitMQ: Multiple vulnerabilitiescert-bund · 2026-07-14
highCVE-2026-57219: RabbitMQ: Unauthenticated disclosure of OAuth client credentials via an HTTP API endpoint with…msrc · 2026-07-14