# CVE-2026-57212: rabbitmq-server: RabbitMQ is a messaging and streaming broker

CVE-2026-57212 is fixed in rabbitmq-server on 1 platform, first by DEBIAN-CVE-2026-57212, released July 18, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-57212
- Priority: High
- CVSS: 7.7 (high)
- EPSS: 0.0043
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 10, 2026

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | rabbitmq-server Debian 14 | 4.3.0-2 | [DEBIAN-CVE-2026-57212](https://patchblox.com/security/data/fix/linux/debian-cve-2026-57212.md) | Jul 18, 2026 |
| Linux | rabbitmq-server Fedora 43 | 4.0.9-5.fc43 | [FEDORA-2026-548235EA3B](https://patchblox.com/security/data/fix/linux/fedora-2026-548235ea3b.md) | Jul 30, 2026 |
| Linux | rabbitmq-server opensuse-leap 16.0 | 4.1.5-160000.2.1 | [OPENSUSE-SU-2026:21903-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21903-1.md) | Sep 22, 2026 |
| Linux | rabbitmq-server sles 16.0 | 4.1.5-160000.2.1 | [SUSE-SU-2026:23869-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-23869-1.md) | Sep 22, 2026 |

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Data as of 2026-11-08T13:06:02Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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