[{"vendor":"Red Hat","product":"Red Hat OpenShift Container Platform 4","defaultStatus":"affected","cpes":["cpe:/a:redhat:openshift:4"]},{"vendor":"Red Hat","product":"Red Hat OpenStack Platform 16.2","defaultStatus":"affected","cpes":["cpe:/a:redhat:openstack:16.2"]},{"vendor":"Red Hat","product":"Red Hat OpenStack Platform 17.1","defaultStatus":"affected","cpes":["cpe:/a:redhat:openstack:17.1"]},{"vendor":"Red Hat","product":"Red Hat OpenStack Platform 18.0","defaultStatus":"affected","cpes":["cpe:/a:redhat:openstack:18.0"]}]

[{"vendor":"Red Hat","product":"Red Hat OpenShift Container Platform 4","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"python-oslo-messaging","cpes":["cpe:/a:redhat:openshift:4"]},{"vendor":"Red Hat","product":"Red Hat OpenStack Platform 16.2","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"python-oslo-messaging","cpes":["cpe:/a:redhat:openstack:16.2"]},{"vendor":"Red Hat","product":"Red Hat OpenStack Platform 17.1","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"python-oslo-messaging","cpes":["cpe:/a:redhat:openstack:17.1"]},{"vendor":"Red Hat","product":"Red Hat OpenStack Platform 18.0","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"python-oslo-messaging","cpes":["cpe:/a:redhat:openstack:18.0"]}]

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

CWE-295

https://access.redhat.com/security/cve/CVE-2026-44393

https://bugzilla.redhat.com/show_bug.cgi?id=2484835

https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44393.json

[{"vendor":"Red Hat","product":"Red Hat OpenShift Container Platform 4","defaultStatus":"affected","cpes":["cpe:/a:redhat:openshift:4"]},{"vendor":"Red Hat","product":"Red Hat OpenStack Platform 16.2","defaultStatus":"affected","cpes":["cpe:/a:redhat:openstack:16.2"]},{"vendor":"Red Hat","product":"Red Hat OpenStack Platform 17.1","defaultStatus":"affected","cpes":["cpe:/a:redhat:openstack:17.1"]},{"vendor":"Red Hat","product":"Red Hat OpenStack Platform 18.0","defaultStatus":"affected","cpes":["cpe:/a:redhat:openstack:18.0"]}]

{"timestamp":"2026-06-04T17:24:03.909681Z","id":"CVE-2026-44393","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}

[{"vendor":"n/a","product":"n/a","versions":[{"version":"n/a","status":"affected"}]}]

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

CWE-297

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.

https://bugs.launchpad.net/oslo.messaging/+bug/2150316

https://wiki.openstack.org/wiki/OSSN/OSSN-0096