Oversized JSON Body Vulnerability in RabbitMQ Management API
CVE-2026-57212

7.1HIGH

Key Information:

Vendor

RabbitMQ

Status
RabbitMQ-server
Vendor
CVE Published:
10 July 2026

What is CVE-2026-57212?

A vulnerability exists in the RabbitMQ management HTTP API prior to versions 3.13.14, 4.0.19, 4.1.10, and 4.2.5. The API improperly processes oversized valid JSON bodies, particularly in the with_decode and direct_request paths. The check for the accumulated size does not correctly account for the final combined size, allowing potential exploitation through oversized JSON payloads. This issue has been addressed in the fixed versions mentioned.

Affected Version(s)

rabbitmq-server >= 4.2.0, < 4.2.5 < 4.2.0, 4.2.5

rabbitmq-server >= 4.1.0, < 4.1.10 < 4.1.0, 4.1.10

rabbitmq-server >= 4.0.0, < 4.0.19 < 4.0.0, 4.0.19

References

https://github.com/rabbitmq/rabbitmq-server/security/advi...
x_refsource_CONFIRM
https://github.com/rabbitmq/rabbitmq-server/pull/15712
x_refsource_MISC
https://github.com/rabbitmq/rabbitmq-server/pull/15714
x_refsource_MISC

CVSS V4

Score:
7.1
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.