Auth bypass in Broadcom Rabbitmq Server
CVE-2026-57215
RabbitMQ is a messaging and streaming broker. Prior to 3.13.15, 4.0.20, 4.1.11, and 4.2.6, RabbitMQ allows foreign bindings to amq.rabbitmq.reply-to destinations because volatile direct-reply-to queues can be accepted at bind and route time but are missing from Khepri-backed deletion checks, leaving persistent route entries after unbind. This issue is fixed in versions 3.13.15, 4.0.20, 4.1.11, and 4.2.6.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.004 (30.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 30th percentile — 30.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.004 · change: -0.003
Affected products
- Broadcom Rabbitmq Server
- Rabbitmq Rabbitmq-Server — versions >= 4.2.0, < 4.2.6, >= 4.1.0, < 4.1.11, >= 4.0.0, < 4.0.21
Weakness classification (CWE)
References
- github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-5cq3-v9jx-p3x3 (Exploit, Vendor Advisory)
- github.com/rabbitmq/rabbitmq-server/pull/15935 (Patch, Issue Tracking)
- github.com/rabbitmq/rabbitmq-server/pull/15938 (Patch, Issue Tracking)
- github.com/rabbitmq/rabbitmq-server/commit/9055500d10ca7629dd2b051c6dc7a4b0bb8f… (Patch)
- github.com/rabbitmq/rabbitmq-server/commit/c84f3c880e0f22b49c01237cf8f86e176eea… (Patch)
- github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.6 (Release Notes)
Frequently asked questions
- What is CVE-2026-57215?
- CVE-2026-57215 is a high-severity vulnerability in Broadcom Rabbitmq Server, classified under Incorrect Authorization. CVSS score: 8.8/10. Published 2026-07-10.
- How severe is CVE-2026-57215?
- High severity. CVSS v3 base score is 8.8 out of 10.