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CVE-2026-57215

RabbitMQ: Direct-reply-to binding persistence can lead to unauthorized reply-channel injection and persistent phantom

HIGH
8.8
CVSS Score
Published: July 10, 2026 at 08:23 PM UTC
Updated: October 25, 2026 at 03:10 PM UTC
2 products affected across 2 vendorsRabbitmq ServerRabbitmq Server

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Severity
HIGH8.8
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

Description

RabbitMQ is a messaging and streaming broker. Prior to 3.13.15, 4.0.20, 4.1.11, and 4.2.6, RabbitMQ allows foreign bindings to amq.rabbitmq.reply-to destinations because volatile direct-reply-to queues can be accepted at bind and route time but are missing from Khepri-backed deletion checks, leaving persistent route entries after unbind. This issue is fixed in versions 3.13.15, 4.0.20, 4.1.11, and 4.2.6.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Rabbitmq Server· Broadcom
95%
3.13.0 ≤ v < 4.2.6
Affected range stops below 4.2.6, so it looks safe — our inference, not a vendor statement
Rabbitmq Server· Rabbitmq
90%
Affected range stops below 3.13.15, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.0.21, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.1.11, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.2.6, so it looks safe — our inference, not a vendor statement

References (6)

x_refsource_CONFIRMExploitVendor Advisory
Source: cverecord
https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-5cq3-v9jx-p3x3
x_refsource_MISCIssue TrackingPatch
Source: cverecord
https://github.com/rabbitmq/rabbitmq-server/pull/15935
x_refsource_MISCIssue TrackingPatch
Source: cverecord
https://github.com/rabbitmq/rabbitmq-server/pull/15938
x_refsource_MISCPatch
Source: cverecord
https://github.com/rabbitmq/rabbitmq-server/commit/9055500d10ca7629dd2b051c6dc7a4b0bb8f6734
x_refsource_MISCPatch
Source: cverecord
https://github.com/rabbitmq/rabbitmq-server/commit/c84f3c880e0f22b49c01237cf8f86e176eeadc72
x_refsource_MISCRelease Notes
Source: cverecord
https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.6

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.8HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-863

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