What’s Vulnerable › Vulnerabilities

CVE-2026-57218: RabbitMQ: AMQP 0-9-1 in combination with OAuth 2: consumer persistence can lead to post-revocation message disclosure

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-07-10 · updated 2026-10-25
• Weakness: CWE-863

Description

RabbitMQ is a messaging and streaming broker. Prior to 4.2.6, RabbitMQ AMQP 0-9-1 allows an existing consumer to keep receiving messages after OAuth token expiry or connection.update_secret refresh to reduced scopes because existing consumers are not canceled or reauthorized at delivery time after the channel user state changes. This issue is fixed in version 4.2.6.

Affected products

• rabbitmq-server: from 4.2.0 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/501ad947cd6bbcc9486fe96e0d073992bfe52cc4
• https://github.com/rabbitmq/rabbitmq-server/commit/db20d6c0fcf3056030f244b5adab0d45c0db0c9e
• https://github.com/rabbitmq/rabbitmq-server/pull/16092
• https://github.com/rabbitmq/rabbitmq-server/pull/16097
• https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.6
• https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-wmrr-4h5v-5ch7
• https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-wmrr-4h5v-5ch7

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