CVE-2026-67410: CWE-200: Exposure of Sensitive Information to an Unauthorized Actor in rabbitmq rabbitmq-server
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.
AI Analysis
Technical Summary
RabbitMQ server versions >=4.3.0 <4.3.3 and >=4.2.0 <4.2.9 contain a CWE-200 vulnerability where the OAuth2 client secret is exposed through the unauthenticated endpoint /js/oidc-oauth/bootstrap.js. This endpoint serves JavaScript that includes the oauthclientsecret configuration value without requiring authentication. This exposure allows an attacker who can reach the management UI port to obtain the OAuth2 client secret, enabling token theft and client impersonation by completing the authorization code flow with stolen credentials. The vulnerability is addressed in versions 4.3.3 and 4.2.9.
Potential Impact
An attacker with network access to the RabbitMQ Management UI port can retrieve the OAuth2 client secret without authentication. This can lead to theft of authorization tokens and client impersonation, potentially allowing unauthorized access to RabbitMQ resources. The vulnerability affects deployments using OAuth2 authentication with a configured client secret.
Mitigation Recommendations
This vulnerability is fixed in RabbitMQ server versions 4.3.3 and 4.2.9. Users should upgrade to at least these versions to remediate the issue. No other mitigations are indicated by the vendor advisory.
CVE-2026-67410: CWE-200: Exposure of Sensitive Information to an Unauthorized Actor in rabbitmq rabbitmq-server
Description
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.
CVSS v4.0
Score 8.2high
Affected software
rabbitmq
rabbitmq-server
pkg:github/rabbitmq/rabbitmq-serverRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
RabbitMQ server versions >=4.3.0 <4.3.3 and >=4.2.0 <4.2.9 contain a CWE-200 vulnerability where the OAuth2 client secret is exposed through the unauthenticated endpoint /js/oidc-oauth/bootstrap.js. This endpoint serves JavaScript that includes the oauthclientsecret configuration value without requiring authentication. This exposure allows an attacker who can reach the management UI port to obtain the OAuth2 client secret, enabling token theft and client impersonation by completing the authorization code flow with stolen credentials. The vulnerability is addressed in versions 4.3.3 and 4.2.9.
Potential Impact
An attacker with network access to the RabbitMQ Management UI port can retrieve the OAuth2 client secret without authentication. This can lead to theft of authorization tokens and client impersonation, potentially allowing unauthorized access to RabbitMQ resources. The vulnerability affects deployments using OAuth2 authentication with a configured client secret.
Mitigation Recommendations
This vulnerability is fixed in RabbitMQ server versions 4.3.3 and 4.2.9. Users should upgrade to at least these versions to remediate the issue. No other mitigations are indicated by the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-07-29T15:02:20.412Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6ab6a5d5f7a7c54106055643
Added to database: 09/25/2026, 16:48:21 UTC
Last enriched: 09/25/2026, 17:02:40 UTC
Last updated: 09/26/2026, 02:45:10 UTC
Views: 13
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