Advisory severityMedium6.5Vendor: HighRed Hat Linux

Medium [CVE-2026-57217] Authorization bypass allows unauthorized topic writes and binds during metadata-store failures

This medium-severity Red Hat Linux advisory covers CVE-2026-57217 affecting Red Hat Hardened Images.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2026-57217 Source published Jul 10, 2026Source updated Jul 10, 2026

VulniPulse record published Jul 29, 2026Record updated Jul 31, 2026

CVE-2026-57217

Affected products & platforms

Red Hat LinuxUnclassified

Open source advisory

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Summary

RabbitMQ is a messaging and streaming broker. Prior to 3.13.15, 4.0.21, 4.1.11, and 4.2.6, RabbitMQ topic authorization can allow restricted topic writes and binds during metadata-store failures because topic-permission lookup errors from Khepri can collapse to undefined, which the internal backend treats as allow.

This issue is fixed in versions 3.13.15, 4.0.21, 4.1.11, and 4.2.6. This vulnerability could enable an attacker to bypass intended topic restrictions, potentially leading to unauthorized message manipulation or access.

Red Hat severity: Important — CVSS 6.5 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N). Weakness: CWE-280.

Affected Red Hat products: Red Hat Hardened Images. Red Hat lists Red Hat OpenStack Platform 16.2; Red Hat OpenStack Platform 17.1; Red Hat OpenStack Platform 18.0 as not affected.

Red Hat fixing advisory: RHSA-2026:35939, RHSA-2026:35940.

Affected versions

< 3.13.15
< 4.0.21
< 4.1.11
< 4.2.6

Official advisory · high-confidence parse· fetched 12 days ago·verify at source

Fixed versions

3.13.15
4.0.21
4.1.11
4.2.6
rabbitmq-server4-3-main-4.3.2-1.hum1
rabbitmq-server4-2-main-4.2.8-1.hum1
RHSA-2026:35939
RHSA-2026:35940

Official advisory · high-confidence parse· fetched 12 days ago·verify at source

Mitigation

Upgrade to a fixed release: 3.13.15, 4.0.21, 4.1.11, 4.2.6, rabbitmq-server4-3-main-4.3.2-1.hum1, rabbitmq-server4-2-main-4.2.8-1.hum1. That is the remediation for this advisory.

The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.

Official advisory · high-confidence parse· fetched 12 days ago·verify at source

Discussion(0)

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