---
id: CVE-2026-67410
title: RabbitMQ is a messaging and streaming broker
summary: >-
  RabbitMQ is a messaging and streaming broker. From 4.2.0 until 4.3.3 and
  4.2.9, OAuth2 Client Secret Exposed via Unauthenticated JavaScript Endpoint
  (CWE-200). when OAuth2 authentication is enabled for the RabbitMQ Management
  UI and the …
severity: high
cvss: 7.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N'
cwe:
  - CWE-200
  - CWE-201
vendor: broadcom
product: rabbitmq_server
affected:
  - 'rabbitmq_server >= 4.2.0, < 4.2.9'
  - 'rabbitmq_server >= 4.3.0, < 4.3.3'
patched:
  - rabbitmq_server 4.3.3
published: '2026-09-25'
updated: '2026-10-08'
sourceUpdated: '2026-10-08T15:43:35.610'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-67410'
references:
  - url: >-
      https://github.com/rabbitmq/rabbitmq-server/commit/60a85d3605ebf94fd234497242812547d441d457
    label: security-advisories@github.com
  - url: >-
      https://github.com/rabbitmq/rabbitmq-server/commit/869f800998334bb363f2ad046f58de9caedc409e
    label: security-advisories@github.com
  - url: 'https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.9'
    label: security-advisories@github.com
  - url: 'https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.3.3'
    label: security-advisories@github.com
  - url: >-
      https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-f9f2-q3jf-wfj3
    label: security-advisories@github.com
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-67410.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-67410'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2541522'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-67410'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-67410'
  - url: 'https://access.redhat.com/errata/RHSA-2026:67552'
tags:
  - nvd
  - cve.org
  - exploit-available
  - csaf
  - vex
  - red-hat
epss: 0.00408
epssPercentile: 0.34926
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-25T17:45:46.514401Z'
scores:
  nvd: 7.1
  cna: 8.2
  vendor: 7.5
ingestedAt: '2026-09-25T17:13:14.021Z'
---

## Overview

RabbitMQ is a messaging and streaming broker. From 4.2.0 until 4.3.3 and 4.2.9, OAuth2 Client Secret Exposed via Unauthenticated JavaScript Endpoint (CWE-200). when OAuth2 authentication is enabled for the RabbitMQ Management UI and the configured flow, IDP use a client secret, the oauthclientsecret configuration value is included in the JavaScript served by the unauthenticated endpoint /js/oidc-oauth/bootstrap.js. Any user who can reach the management UI port can retrieve the OAuth2 client secret without Files: deps/rabbitmqmanagement/src/rabbitmgmtwmauth.erl, line 186 deps/rabbitmqmanagement/src/rabbitmgmtoauthbootstrap.erl, lines 35-50 deps/rabbitmqmanagement/src/rabbitmgmtdispatcher.erl, lines 45-49 (route registration) Code Path: 1. The route /js/oidc-oauth/bootstrap.js is registered as a plain Cowboy handler (rabbitmgmtdispatcher.erl:46): Credential exposure for the affected configuration: OAuth2 client secret is accessible without any authentication Token theft: Attacker can complete the authorization code flow using stolen authorization codes Client impersonation: Attacker can make requests. Any RabbitMQ deployment with: This issue is fixed in versions 4.3.3 and 4.2.9.

## Affected

- `rabbitmq_server >= 4.2.0, < 4.2.9`
- `rabbitmq_server >= 4.3.0, < 4.3.3`

## Remediation

Upgrade past the affected range:

- `rabbitmq_server 4.3.3`

## Vendor advisories

- **RHSA-2026:67552** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-09-15 · [advisory](https://access.redhat.com/errata/RHSA-2026:67552)
- **Red Hat VEX** · Important · affected: Red Hat Hardened Images · no fix planned: Red Hat Hardened Images · updated 2026-10-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-67410.json)