CVE-2026-61837: broadcom rabbitmq_server Improper Authorization
Vulnerability summary
CVE-2026-61837 is a medium (CVSS 6.3) Improper Authorization vulnerability in broadcom rabbitmq_server. EPSS estimates a 0.26% chance of exploitation in the next 30 days, higher than 16% of scored vulnerabilities. 1 public exploit is recorded.
Advisory lineage
Upstream 0 · Downstream 1Timeline
- 25-09-2026PublishedVulnerability first disclosed.
- 29-09-2026Last modifiedVulnerability information updated.
Description
RabbitMQ is a messaging and streaming broker. From 4.0.0 until 4.3.3, 4.2.9, 4.1.14, and 4.0.23, AMQP 1.0 management GET /bindings exposes full binding topology to any authenticated AMQP user without resource/management permission checks. the AMQP 1.0 HTTP-over-AMQP management endpoint GET /bindings (the rabbitamqpmanagement handler) enumerates bindings between an arbitrary source exchange and destination queue/exchange in the caller's virtual host without performing any resource-level permission check. Unlike every sibling operation in the same module (which call checkresourceaccess / bindingchecks), the GET handler ignores the authenticated User and returns the binding list unchanged. As a result, any authenticated AMQP 1.0 client that can open a management link pair , including users with no management/monitoring/policymaker/administrator tag , can enumerate the complete binding topology (source exchanges, destination queues/exchanges, routing keys, and binding arguments) of the virtual host they can access. The equivalent HTTP management API (GET /api/bindings) Confidentiality impact: a non-management AMQP 1.0 user can enumerate the complete routing topology of any virtual host it can connect to , every (source exchange, destination queue/exchange, routing key, binding arguments) This issue is fixed in versions 4.3.3, 4.2.9, 4.1.14, and 4.0.23.
CVSS metrics
6 scores · 4 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated6.3MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N
- NVDNIST6.3MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/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
- OSV · DebianEcosystem advisory · calculated5.3MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- NVDNIST5.3MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
EPSS trend
Probability
0.26%
Chance of exploitation in the next 30 days
Percentile
16%
Versus all other CVEs
30-day change
Change unavailable
Change unavailable
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundRabbitmq Server
Maturity: poc
Weaknesses
CWE · root cause- CWE-285Improper AuthorizationThe product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action.
- CWE-862Missing AuthorizationThe product does not perform an authorization check when an actor attempts to access a resource or perform an action.
Affected systems
Broadcom1 product
- rabbitmq_server≥ 4.0.0, < 4.0.23 | ≥ 4.1.0, < 4.1.14 | ≥ 4.2.0, < 4.2.9 | ≥ 4.3.0, < 4.3.3
Debian1 product
- rabbitmq-serverAll versions (No fix recorded) | < 4.3.6-1
Rabbitmq1 product
- rabbitmq-server≥ 4.3.0, < 4.3.3 | ≥ 4.2.0, < 4.2.9 | ≥ 4.1.0, < 4.1.14 | ≥ 4.0.0, < 4.0.23
Ubuntu1 product
- rabbitmq-serverAll versions (No fix recorded)
4 vendors · 4 products
References
8 links- github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-w9hf-476r-443xX Refsource CONFIRMREPORTExploitThird Party Advisory
- github.com/rabbitmq/rabbitmq-server/commit/341e3f2795ebd1f816e712530f651a3221d23ad9X Refsource MISCREPORTPatch
- github.com/rabbitmq/rabbitmq-server/commit/b94004dea530f961b3dc649d94969b89f1a3183fX Refsource MISCREPORTPatch
