TI-2026-41155 Aliases CVE-2026-57217

RabbitMQ: Topic authorization can lead to cross-tenant routing-key bypass

MEDIUM 64CWE-863Published 2026-07-10 · Updated 2026-07-13

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Attack requirements: Present
Impact type: Security bypass
Confidentiality · integrity · availability: High · None · None
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-863.

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00352 29th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix Fixed rabbitmq-server (rabbitmq): 4.2.6, 4.1.11, 4.0.21 +1Red Hat: 2 advisories

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
rabbitmq	rabbitmq-server	4.2.0 to before 4.2.6; 4.1.0 to before 4.1.11; 4.0.0 to before 4.0.21; 3.13.0 to before 3.13.15	4.2.6, 4.1.11, 4.0.21, 3.13.15	Patch available	CNA

rabbitmq-server Vendorrabbitmq Affected 4.2.0 to before 4.2.6; 4.1.0 to before 4.1.11; 4.0.0 to before 4.0.21; 3.13.0 to before 3.13.15 Fixed in 4.2.6, 4.1.11, 4.0.21, 3.13.15 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:broadcom:rabbitmq_server::::::::	3.13.0 to before 4.2.6	Vulnerable	Broadcom

cpe:2.3:a:broadcom:rabbitmq_server:*:*:*:*:*:*:*:* Versions 3.13.0 to before 4.2.6 Vulnerable ·Broadcom

Remediation

Fix · CNA rabbitmq-server (rabbitmq) Fixed in 4.2.6, 4.1.11, 4.0.21, 3.13.15

Red Hat 2 advisories

RHSA-2026:35940 Released 2026-07-06 · Red Hat rating Important
Red Hat Hardened Images RPMs bug fix and enhancement update
- Red Hat Hardened Images rabbitmq-server4-2-main@aarch64, rabbitmq-server4-2-main@src, rabbitmq-server4-2-main@x86_64
RHSA-2026:35939 Released 2026-07-06 · Red Hat rating Important
Red Hat Hardened Images RPMs bug fix and enhancement update
- Red Hat Hardened Images rabbitmq-server4-3-main@aarch64, rabbitmq-server4-3-main@src, rabbitmq-server4-3-main@x86_64

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

Product	Status	Plan or fix
Red Hat Hardened Images	Fixed	RHSA-2026:35939, RHSA-2026:35940

Not affected: 3 products

Red Hat OpenStack Platform 16.2
Red Hat OpenStack Platform 17.1
Red Hat OpenStack Platform 18.0

Timeline

2026-10-02 Threatist record created from CVE-2026-57217

References

Exploit 1

https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-gpvw-75h5-3wvx

Patch 4

Other 1

https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.6

TI-2026-41154 Improper authentication in rabbitmq-server CVSS 3.1CRITICAL 10.0
TI-2026-41149 RabbitMQ: UNC SSRF affecting the management UI on Windows CVSS 3.1CRITICAL 10.0
TI-2026-41158 Resource allocation without limits in rabbitmq-server CVSS 3.1HIGH 7.5
TI-2026-47695 RabbitMQ: OAuth2 Client Secret Exposed via Unauthenticated JavaScript Endpoint CVSS 4.0HIGH 8.2
TI-2026-47694 RabbitMQ: JWKS Fetch Ignores HTTP Response Status Code - Signing Key Destruction Causes Authentication DoS CVSS 4.0HIGH 8.2
TI-2026-45167 RabbitMQ Java client: Unvalidated Class.forName in JSON-RPC ProcedureDescription enables arbitrary class loading CVSS 4.0HIGH 7.5

See all 100 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences