CVE-2026-67237

Critical

Description

RabbitMQ is a messaging and streaming broker. From 4.2.0 until 4.2.8 and 4.3.2, set_token_auth/2 inserted a bearer token from the Authorization header or access_token cookie into OAuth bootstrap JavaScript without escaping, allowing attacker-controlled token content to execute JavaScript in the management UI origin. The endpoint is exposed before authentication only when management.oauth_enabled is true, and exploitation through the cookie path additionally requires the attacker to plant an access_token cookie on the management host. This issue is fixed in versions 4.2.8 and 4.3.2.

SeverityCritical
CVSS9.3
Exploit probability—
ProductBroadcom Rabbitmq Server
PublishedSep 25, 2026
First seenSep 25, 2026

How to fix

Update
  • broadcom rabbitmq_server4.2.8, 4.3.2 or later

Affected products

ProductAffected versionsFixed in
broadcom rabbitmq_server4.2.0 ≤ v < 4.2.8, 4.3.0 ≤ v < 4.3.24.2.8, 4.3.2

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