CVE-2026-57220
RabbitMQ: Stream listener does not enforce configured frame-size limit during authentication, permitting unauth'd mem-exhaust DoS
Description
RabbitMQ is a messaging and streaming broker. Prior to 4.2.6, the RabbitMQ stream listener does not enforce the configured stream frame-size limit while assembling frames during authentication and before Tune negotiation, allowing an unauthenticated remote client to declare oversized frame lengths and consume broker memory in rabbit_stream_core. This issue is fixed in version 4.2.6.
INFO
Published Date :
July 10, 2026, 9:16 p.m.
Last Modified :
July 13, 2026, 8:49 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Update RabbitMQ to version 4.2.6 or later.
- Ensure frame size limits are enforced by the broker.
- Monitor broker memory usage for anomalies.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-57220.
| URL | Resource |
|---|---|
| https://github.com/rabbitmq/rabbitmq-server/commit/595ec28fa1621b1f2c28124e4e0466a8ad963547 | Patch |
| https://github.com/rabbitmq/rabbitmq-server/commit/773a49c4921e8be990262a2d609c35916825679e | Patch |
| https://github.com/rabbitmq/rabbitmq-server/pull/16171 | Issue Tracking Patch |
| https://github.com/rabbitmq/rabbitmq-server/pull/16173 | Issue Tracking Patch |
| https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.6 | Release Notes |
| https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-f364-87q5-j35q | Exploit Vendor Advisory |
| https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-f364-87q5-j35q | Exploit Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-57220 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-57220
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-57220 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-57220 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Jul. 13, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:broadcom:rabbitmq_server:*:*:*:*:*:*:*:* versions up to (excluding) 4.2.6 Added Reference Type GitHub, Inc.: https://github.com/rabbitmq/rabbitmq-server/commit/595ec28fa1621b1f2c28124e4e0466a8ad963547 Types: Patch Added Reference Type GitHub, Inc.: https://github.com/rabbitmq/rabbitmq-server/commit/773a49c4921e8be990262a2d609c35916825679e Types: Patch Added Reference Type GitHub, Inc.: https://github.com/rabbitmq/rabbitmq-server/pull/16171 Types: Issue Tracking, Patch Added Reference Type GitHub, Inc.: https://github.com/rabbitmq/rabbitmq-server/pull/16173 Types: Issue Tracking, Patch Added Reference Type GitHub, Inc.: https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.6 Types: Release Notes Added Reference Type GitHub, Inc.: https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-f364-87q5-j35q Types: Exploit, Vendor Advisory Added Reference Type CISA-ADP: https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-f364-87q5-j35q Types: Exploit, Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 13, 2026
Action Type Old Value New Value Added Reference https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-f364-87q5-j35q Added SSVC {'id': 'CVE-2026-57220', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'yes'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-07-13T16:20:13.084964Z'} -
New CVE Received by [email protected]
Jul. 10, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'rabbitmq', 'product': 'rabbitmq-server', 'versions': [{'status': 'affected', 'version': '>= 4.2.0, < 4.2.6'}]}] Added Description RabbitMQ is a messaging and streaming broker. Prior to 4.2.6, the RabbitMQ stream listener does not enforce the configured stream frame-size limit while assembling frames during authentication and before Tune negotiation, allowing an unauthenticated remote client to declare oversized frame lengths and consume broker memory in rabbit_stream_core. This issue is fixed in version 4.2.6. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Added CWE CWE-770 Added Reference https://github.com/rabbitmq/rabbitmq-server/commit/595ec28fa1621b1f2c28124e4e0466a8ad963547 Added Reference https://github.com/rabbitmq/rabbitmq-server/commit/773a49c4921e8be990262a2d609c35916825679e Added Reference https://github.com/rabbitmq/rabbitmq-server/pull/16171 Added Reference https://github.com/rabbitmq/rabbitmq-server/pull/16173 Added Reference https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.6 Added Reference https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-f364-87q5-j35q