What’s Vulnerable › Vulnerabilities

CVE-2026-57219: RabbitMQ: Unauthenticated disclosure of OAuth client credentials via an HTTP API endpoint with certain less common OAuth 2 configurations

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.8% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-07-10 · updated 2026-10-25
• Weakness: CWE-200

Description

RabbitMQ is a messaging and streaming broker. Prior to 3.13.15, 4.0.20, 4.1.11, and 4.2.6, the obsolete GET /api/auth endpoint can disclose the OAuth 2 client secret on RabbitMQ installations configured with management.oauth_client_secret, exposing credentials to unauthenticated callers when the management plugin and that OAuth configuration are enabled. This issue is fixed in versions 3.13.15, 4.0.20, 4.1.11, and 4.2.6.

Affected products

• rabbitmq-server: from 3.13.0 before 4.2.6 — fixed in 4.2.6

How to fix

Upgrade to a fixed version: rabbitmq-server 4.2.6. Check the vendor advisory for mitigations.

References

• https://github.com/rabbitmq/rabbitmq-server/commit/98b1daf740237c85941e8addcbea6e74f4a2743c
• https://github.com/rabbitmq/rabbitmq-server/commit/aa387c4451e7b674df3e3ba89df86a99d697cc7f
• https://github.com/rabbitmq/rabbitmq-server/pull/16083
• https://github.com/rabbitmq/rabbitmq-server/pull/16086
• https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.6
• https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-pj24-8j6m-vq9q

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