High severity · published Jul 10, 2026
CVE-2026-57212
RabbitMQ management HTTP API accepts request bodies larger than configured max_http_body_size
7.7
CVSS
0.4%
EPSS
No
On KEV
Description
RabbitMQ is a messaging and streaming broker. Prior to 3.13.14, 4.0.19, 4.1.10, and 4.2.5, the rabbitmq_management HTTP API accepts oversized valid JSON bodies on with_decode and direct_request paths because read_complete_body checks the accumulated size before the final chunk but not the final combined size. This issue is fixed in versions 3.13.14, 4.0.19, 4.1.10, and 4.2.5.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 37% 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, < 4.2.5; >= 4.1.0, < 4.1.10; >= 4.0.0, < 4.0.19; >= 3.13.0, < 3.13.14 · source: vendor
RS
Rabbitmq Server · Broadcom
3.13.0 before 4.2.5 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-57212
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-57212
Patch
https://github.com/rabbitmq/rabbitmq-server/commit/3976d148901bdfa82e1cd60b7a4534e073266ba5
Patch
https://github.com/rabbitmq/rabbitmq-server/commit/b8fc2ef7c50a2797d15e1ea7cf34f290032303bb
Issue Tracking
https://github.com/rabbitmq/rabbitmq-server/pull/15712
Issue Tracking
https://github.com/rabbitmq/rabbitmq-server/pull/15714
Release Notes
https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.5
Exploit
https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-5cmq-vp28-xqrj
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