PT-2026-46260 · Undefined · Undefined

Published 2026-06-04 · Updated 2026-06-04 · CVE-2026-44393

NVD

CVSS v3.1

7.4

High

Base vector

AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

An issue was discovered in OpenStack oslo.messaging 1.0.0 through 17.3.0. The oslo.messaging RabbitMQ driver does not perform TLS hostname verification when connecting to the message broker. When ssl ca file is configured, the driver enables certificate chain validation but does not pass the expected broker hostname into the underlying TLS stack. Any certificate signed by the deployment CA is accepted regardless of hostname, allowing an attacker who can intercept control-plane traffic to impersonate the RabbitMQ broker and perform a man-in-the-middle attack on RPC and notification traffic. All OpenStack services using oslo.messaging with RabbitMQ over TLS are affected.

Fix

Weakness Enumeration

CWE-297

Related Identifiers

CVE-2026-44393

Affected Products

Undefined

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-44393 · Security Note
• https://wiki.openstack.org/wiki/OSSN/OSSN-0096 · Note
• https://bugs.launchpad.net/oslo.messaging/+bug/2150316 · Note