# CVE-2026-57219: RabbitMQ: Unauthenticated disclosure of OAuth client credentials via an HTTP API endpoint with certain less common OAuth 2 configurations

CVE-2026-57219 is fixed in rabbitmq-server on 1 platform, first by DEBIAN-CVE-2026-57219, released July 18, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-57219
- Priority: High
- CVSS: 7.5 (Important)
- EPSS: 0.0284
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 10, 2026
- Weakness: Exposure of Sensitive Information to an Unauthorized Actor
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-57219

## Description

RabbitMQ is a messaging and streaming broker. Prior to 3.13.15, 4.0.20, 4.1.11, and 4.2.6, the obsolete GET /api/auth endpoint can disclose the OAuth 2 client secret on RabbitMQ installations configured with management.oauth_client_secret, exposing credentials to unauthenticated callers when the management plugin and that OAuth configuration are enabled. This issue is fixed in versions 3.13.15, 4.0.20, 4.1.11, and 4.2.6.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | rabbitmq-server Debian 14 | 4.3.0-2 | [DEBIAN-CVE-2026-57219](https://patchblox.com/security/data/fix/linux/debian-cve-2026-57219.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 |

---

Data as of 2026-11-09T01:18:40Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.