# CVE-2026-67232

Unauthenticated WebSocket permessage-deflate decompression DoS in RabbitMQ Web-MQTT

- Page: https://www.vulneraibility.com/cve/CVE-2026-67232
- CVSS: 8.2
- Known exploited: not in CISA KEV as of our last sync
- EPSS: 0.39% (percentile 33.9)
- CISA SSVC: exploitation none, automatable no, technical impact partial (assessed 2026-09-24)
- Weakness: CWE-409
- Also known as: GHSA-gmgx-hhg5-43gr
- Published: 2026-09-23

## Affected versions

- rabbitmq: affected >= 3.13.0 and < 3.13.15; >= 4.0.0 and < 4.0.20; >= 4.1.0 and < 4.1.11; >= 4.2.0 and < 4.2.6; fixed in 3.13.15, 4.0.20, 4.1.11, 4.2.6 (Bitnami advisory, via OSV)
- rabbitmq rabbitmq-server: affected >= 3.13.0 and < 3.13.15; >= 4.0.0 and < 4.0.20; >= 4.1.0 and < 4.1.11; >= 4.2.0 and < 4.2.6

A version outside these ranges is not a statement that it is unaffected.

## Impact

Unauthenticated remote crash/DoS: attacker sends a small compressed WebSocket frame that inflates to gigabytes, exhausting memory and crashing the node.

## Action

Immediate action required

## Recommendation

Upgrade to fixed versions or disable rabbitmq_web_mqtt / block ports 15675-15676 until patched.

## References

- [other] https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-gmgx-hhg5-43gr
- [other] https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.6
- [other] https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.3.0

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.