CVE-2026-57217: RabbitMQ: Topic authorization can lead to cross-tenant routing-key bypass

mediumCVSS 6.5CVE-2026-57217

CSIRTS triage

vendor: RabbitMQ product: RabbitMQ Authentication bypass

What: Topic authorization can lead to cross-tenant routing-key bypass.
Who is affected: Deployments of RabbitMQ that utilize topic authorization.
Urgency: Remediation is medium urgency as exploitation is possible but not currently active.
Action: Review and update authorization configurations in RabbitMQ.

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

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Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: medium — CVSS 6.5
Published: 2026-07-14
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-57217

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-2026-572170.35% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 28% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-57217	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.

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