CVE-2021-22116

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-06-08 · updated 2026-06-17
Weakness: CWE-400

Description

RabbitMQ all versions prior to 3.8.16 are prone to a denial of service vulnerability due to improper input validation in AMQP 1.0 client connection endpoint. A malicious user can exploit the vulnerability by sending malicious AMQP messages to the target RabbitMQ instance having the AMQP 1.0 plugin enabled.

Affected products

Debian Linux: 9.0
VMware Tanzu RabbitMQ: before 3.8.16 — fixed in 3.8.16
RabbitMQ: RabbitMQ prior to version 3.8.16

How to fix

Upgrade to a fixed version: VMware Tanzu RabbitMQ 3.8.16. Check the vendor advisory for mitigations.

References

https://lists.debian.org/debian-lts-announce/2021/07/msg00011.html
https://tanzu.vmware.com/security/cve-2021-22116
https://lists.debian.org/debian-lts-announce/2021/07/msg00011.html
https://tanzu.vmware.com/security/cve-2021-22116

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