Description
RabbitMQ is a messaging and streaming broker. From 3.13.0 until 3.13.15, 4.0.20, 4.1.11, and 4.2.6, the Web STOMP WebSocket handler enforced neither max_frame_size nor login_timeout before authentication, allowing an unauthenticated client to keep a connection alive with a slow stream of small frames and accumulate unbounded pre-authentication state. The rabbitmq_web_stomp plugin must be enabled, and no authentication is required to reach the vulnerable path. This issue is fixed in versions 3.13.15, 4.0.20, 4.1.11, and 4.2.6.
Affected products
broadcom: rabbitmq server
References5
- github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-7v… Vendor Advisory
- github.com/rabbitmq/rabbitmq-server/commit/0b4080fa5d6f797b6331… Patch
- github.com/rabbitmq/rabbitmq-server/commit/8138edae6d2beaafe699… Patch
- github.com/rabbitmq/rabbitmq-server/commit/c1000ba89052608c01c0… Patch
- github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.6 Release NotesPatch
Metrics
- CVSS 3.1
-
7.5
HIGH
Score source: NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS 4.0
-
6.3
MEDIUM
Score source: CNA
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - EPSS — exploit probability
- 1% percentile: 48 · as of 9 November 2026
- CWE
- CWE-770
Could this be exploited in your environment?
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