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Fencer Vulns
high 7.5

CVE-2026-57219 json

RabbitMQ: Unauthenticated disclosure of OAuth client credentials via an HTTP API endpoint with certain less common OAuth 2 configurations

published 2026-07-10 4 mo ago modified 2026-10-25 15 d ago also EUVD-2026-43021

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.8%
EPSS 2.8% chance of exploitation in 30 days, percentile 86%
public exploits
0
none known, plus a Nuclei check

Summary

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.

Patch / fix

  • broadcom rabbitmq_server 4.2.6
  • rabbitmq-server Debian 14 4.3.0-2

debian advisories DEBIAN-CVE-2026-57219

  • rabbitmq-server4.3 hummingbird 1 4.3.2-1.hum1
  • rabbitmq-server4.2 hummingbird 1 4.2.8-1.hum1

red hat advisories RHSA-2026:35939RHSA-2026:35940

  • rabbitmq-server SLES 16.0, SLES for SAP applications 16.0 4.1.5-160000.2.1

suse advisories SUSE-SU-2026:23859-1SUSE-SU-2026:23869-1

  • rabbitmq-server openSUSE Leap 16.0 4.1.5-160000.2.1

opensuse advisories openSUSE-SU-2026:21903-1

  • rabbitmq-server Azure Linux 3.0 3.13.7-8

azure linux advisories AZL-92334

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-57219 updated cvss 7.5

RabbitMQ: RabbitMQ: OAuth 2 client secret disclosure via obsolete API endpoint

  • Red Hat Hardened Images rabbitmq-server4.2 4.2.8-1.hum1, rabbitmq-server4.3 4.3.2-1.hum1
    fixed: vendor fix RHSA-2026:35940
  • Red Hat OpenStack Platform 16.2 rabbitmq-server Red Hat OpenStack Platform 17.1 rabbitmq-server Red Hat OpenStack Platform 18.0 rabbitmq-server
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
3 mo ago

Exploit prediction

2.84% chance of exploitation in the next 30 days, higher than 86% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • Nuclei template RabbitMQ Management - OAuth 2 Client Secret Disclosure nuclei detection template

CVSS scores

assigned by version score vector
CNA 4.0 8.7 CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N
CNA 4.0 8.7 CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

  • rabbitmq rabbitmq-server

Classification

Weakness
  • CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
  • CWE-522 Insufficiently Protected Credentials

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.