Medium severity · published Jul 10, 2026
CVE-2026-57218
RabbitMQ: AMQP 0-9-1 in combination with OAuth 2: consumer persistence can lead to post-revocation message disclosure
6.5
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 29% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RA
rabbitmq-server · rabbitmq
>= 4.2.0, < 4.2.6 · source: vendor
RS
Rabbitmq Server · Broadcom
4.2.0 before 4.2.6 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-57218
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-57218
Patch
https://github.com/rabbitmq/rabbitmq-server/commit/501ad947cd6bbcc9486fe96e0d073992bfe52cc4
Patch
https://github.com/rabbitmq/rabbitmq-server/commit/db20d6c0fcf3056030f244b5adab0d45c0db0c9e
Issue Tracking
https://github.com/rabbitmq/rabbitmq-server/pull/16092
Issue Tracking
https://github.com/rabbitmq/rabbitmq-server/pull/16097
Release Notes
https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.6
Exploit
https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-wmrr-4h5v-5ch7
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