CVE-2026-57220

RabbitMQ: Stream listener does not enforce configured frame-size limit during authentication, permitting unauth'd mem-exhaust DoS

CVE-2026-57220 is fixed in rabbitmq-server on 1 platform, first by OPENSUSE-SU-2026:21903-1, released September 22, 2026. It is not reported as exploited. Patch Radar priority: High.

High

CVSS

7.5

Important

Exploitation

None reported

No vendor assessment

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0055

46th percentile

stream listener does not enforce configured frame-size limit during authentication, permitting

Where it's fixed

Product	Fixed in	Fix	Released
Linux
rabbitmq-server · opensuse-leap 16.0	4.1.5-160000.2.1	OPENSUSE-SU-2026:21903-1	Sep 22, 2026
rabbitmq-server · sles 16.0	4.1.5-160000.2.1	SUSE-SU-2026:23869-1	Sep 22, 2026

Details

Published
July 15, 2026
Weakness
Allocation of Resources Without Limits or Throttling
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-57220

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