RabbitMQ: Topic authorization can lead to cross-tenant routing-key bypass

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Summary

CVECVE-2026-57217
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-10 21:16:58 UTC
Updated2026-07-10 21:16:58 UTC
DescriptionRabbitMQ is a messaging and streaming broker. Prior to 3.13.15, 4.0.21, 4.1.11, and 4.2.6, RabbitMQ topic authorization can allow restricted topic writes and binds during metadata-store failures because topic-permission lookup errors from Khepri can collapse to undefined, which the internal backend treats as allow. This issue is fixed in versions 3.13.15, 4.0.21, 4.1.11, and 4.2.6.

Risk And Classification

Primary CVSS: v4.0 7 HIGH from [email protected]

CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Problem Types: CWE-863 | CWE-863 CWE-863: Incorrect Authorization

VersionSourceTypeScoreSeverityVector
4.0[email protected]Secondary7HIGHCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/E:X/C...
4.0CNADECLARED7HIGHCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N

CVSS v4.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
Present
Privileges Required
Low
User Interaction
None
Confidentiality
High
Integrity
None
Availability
None
Sub Conf.
High
Sub Integrity
None
Sub Availability
None

CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Rabbitmq Rabbitmq-server affected >= 4.2.0, < 4.2.6 Not specified
CNA Rabbitmq Rabbitmq-server affected >= 4.1.0, < 4.1.11 Not specified
CNA Rabbitmq Rabbitmq-server affected >= 4.0.0, < 4.0.21 Not specified
CNA Rabbitmq Rabbitmq-server affected >= 3.13.0, < 3.13.15 Not specified

References

ReferenceSourceLinkTags
github.com/rabbitmq/rabbitmq-server/commit/ce1f682aa6b398820c5e3ce1ff743... [email protected] github.com
github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.6 [email protected] github.com
github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-gpvw-75h5-3wvx [email protected] github.com
github.com/rabbitmq/rabbitmq-server/pull/15941 [email protected] github.com
github.com/rabbitmq/rabbitmq-server/pull/15943 [email protected] github.com
github.com/rabbitmq/rabbitmq-server/commit/94f1d33a70fcfa09006649599e79f... [email protected] github.com
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