CVE-2026-67410
HighCVSS 7.1Exploitation Probability (EPSS)
Low risk32th percentile - higher than 32% of all known CVEs
Summary
Vulnerability in RabbitMQ from 4.2.0 until 4.3.3 and 4.2.9, exposing the OAuth2 client secret via an unauthenticated JavaScript endpoint. When OAuth2 authentication is enabled for the RabbitMQ Management UI with a client secret, the oauthclientsecret value is included in 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.
Risk Assessment
Exposure of the OAuth2 client secret could allow an attacker to steal tokens, impersonate the client, and perform unauthorized actions.
Recommendation
Update RabbitMQ to version 4.3.3 or 4.2.9 (or later) and rotate the exposed client secret.
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Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

