CVE-2026-44393
Fixed in a distro release EPSS <1%CVSS 7.4
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.
Products: Red Hat OpenStack Platform 16.2, Red Hat OpenShift Container Platform 4, Red Hat OpenStack Platform 17.1, Red Hat OpenStack Platform 18.0
Fixed upstream
| Ecosystem | Package | Fixed in |
|---|---|---|
| PyPI | oslo-messaging | no fix |
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Chainguard | openstack-barbican-2025.2 | no fix |
| Chainguard | openstack-designate-2025.2 | no fix |
| Chainguard | openstack-designate-2026.1 | no fix |
| Chainguard | openstack-glance-2025.1 | no fix |
| Chainguard | openstack-glance-2025.1-fips | no fix |
| Chainguard | openstack-glance-2025.2 | no fix |
| Chainguard | openstack-glance-2025.2-fips | no fix |
| Chainguard | openstack-glance-2026.1 | 32.0.0_git20260930-r1 |
| Chainguard | openstack-glance-2026.1-fips | no fix |
| Chainguard | openstack-heat-2025.2 | no fix |
| Chainguard | openstack-horizon-2025.1 | no fix |
| Chainguard | openstack-horizon-2025.1-fips | no fix |
| Chainguard | openstack-horizon-2025.2 | no fix |
| Chainguard | openstack-horizon-2025.2-fips | no fix |
| Chainguard | openstack-horizon-2026.1 | no fix |
| Chainguard | openstack-horizon-2026.1-fips | no fix |
| Chainguard | openstack-ironic-2025.2 | no fix |
| Chainguard | openstack-keystone-2025.1 | no fix |
| Chainguard | openstack-keystone-2025.1-fips | no fix |
| Chainguard | openstack-keystone-2025.2 | no fix |
| Chainguard | openstack-keystone-2025.2-fips | no fix |
| Chainguard | openstack-keystone-2026.1 | 29.0.1_git20260904-r11 |
| Chainguard | openstack-keystone-2026.1-fips | 29.0.1_git20260904-r8 |
| Chainguard | openstack-manila-2025.2 | no fix |
| Chainguard | openstack-neutron-2026.1 | 28.0.2_git20260928-r5 |
| Chainguard | openstack-nova-2025.1 | no fix |
| Chainguard | openstack-nova-2025.2 | no fix |
| Chainguard | openstack-nova-2026.1 | 33.0.1_git20260819-r15 |
| Chainguard | openstack-octavia-2025.2 | no fix |
| Chainguard | openstack-placement-2025.1 | no fix |
| Chainguard | openstack-placement-2025.1-fips | no fix |
| Chainguard | openstack-placement-2025.2 | no fix |
| Chainguard | openstack-placement-2025.2-fips | no fix |
| Chainguard | openstack-placement-2026.1 | 15.0.0_git20260806-r13 |
| Chainguard | openstack-placement-2026.1-fips | no fix |
| Chainguard | openstack-tempest-2025.1 | no fix |
| Chainguard | openstack-tempest-2025.2 | no fix |
| Chainguard | openstack-tempest-2026.1 | no fix |
| Debian 12 | python-oslo.messaging | 14.0.3-0+deb12u1 |
| Debian 13 | python-oslo.messaging | 16.1.0-3+deb13u1 |
| Debian 14 | python-oslo.messaging | 17.3.0-4 |
| Red Hat openstack 16.2 | collectd-sensubility | 0:0.2.1-1.1.el8ost |
| Red Hat openstack 16.2 | collectd-sensubility-debuginfo | 0:0.2.1-1.1.el8ost |
| Red Hat openstack 16.2 | erlang | 0:23.3.4.18-2.el8ost |
| Red Hat openstack 16.2 | erlang-asn1 | 0:23.3.4.18-2.el8ost |
| Red Hat openstack 16.2 | erlang-asn1-debuginfo | 0:23.3.4.18-2.el8ost |
| Red Hat openstack 16.2 | erlang-compiler | 0:23.3.4.18-2.el8ost |
| Red Hat openstack 16.2 | erlang-crypto | 0:23.3.4.18-2.el8ost |
| Red Hat openstack 16.2 | erlang-crypto-debuginfo | 0:23.3.4.18-2.el8ost |
| Red Hat openstack 16.2 | erlang-debuginfo | 0:23.3.4.18-2.el8ost |
| Red Hat openstack 16.2 | erlang-debugsource | 0:23.3.4.18-2.el8ost |
| Red Hat openstack 16.2 | erlang-eldap | 0:23.3.4.18-2.el8ost |
| Red Hat openstack 16.2 | erlang-erl_interface-debuginfo | 0:23.3.4.18-2.el8ost |
| Red Hat openstack 16.2 | erlang-erts | 0:23.3.4.18-2.el8ost |
| Red Hat openstack 16.2 | erlang-erts-debuginfo | 0:23.3.4.18-2.el8ost |
| Red Hat openstack 16.2 | erlang-hipe | 0:23.3.4.18-2.el8ost |
| Red Hat openstack 16.2 | erlang-inets | 0:23.3.4.18-2.el8ost |
| Red Hat openstack 16.2 | erlang-kernel | 0:23.3.4.18-2.el8ost |
| Red Hat openstack 16.2 | erlang-mnesia | 0:23.3.4.18-2.el8ost |
| Red Hat openstack 16.2 | erlang-odbc-debuginfo | 0:23.3.4.18-2.el8ost |
| Red Hat openstack 16.2 | erlang-os_mon | 0:23.3.4.18-2.el8ost |
| Red Hat openstack 16.2 | erlang-os_mon-debuginfo | 0:23.3.4.18-2.el8ost |
| Red Hat openstack 16.2 | erlang-parsetools | 0:23.3.4.18-2.el8ost |
| Red Hat openstack 16.2 | erlang-public_key | 0:23.3.4.18-2.el8ost |
| Red Hat openstack 16.2 | erlang-runtime_tools | 0:23.3.4.18-2.el8ost |
| Red Hat openstack 16.2 | erlang-runtime_tools-debuginfo | 0:23.3.4.18-2.el8ost |
| Red Hat openstack 16.2 | erlang-sasl | 0:23.3.4.18-2.el8ost |
| Red Hat openstack 16.2 | erlang-snmp | 0:23.3.4.18-2.el8ost |
| Red Hat openstack 16.2 | erlang-ssl | 0:23.3.4.18-2.el8ost |
| Red Hat openstack 16.2 | erlang-stdlib | 0:23.3.4.18-2.el8ost |
| Red Hat openstack 16.2 | erlang-syntax_tools | 0:23.3.4.18-2.el8ost |
| Red Hat openstack 16.2 | erlang-tools | 0:23.3.4.18-2.el8ost |
| Red Hat openstack 16.2 | erlang-tools-debuginfo | 0:23.3.4.18-2.el8ost |
| Red Hat openstack 16.2 | erlang-xmerl | 0:23.3.4.18-2.el8ost |
| Red Hat openstack 16.2 | etcd | 0:3.3.23-22.el8ost |
| Red Hat openstack 16.2 | etcd-debuginfo | 0:3.3.23-22.el8ost |
| Red Hat openstack 16.2 | etcd-debugsource | 0:3.3.23-22.el8ost |
| Red Hat openstack 16.2 | openstack-glance | 1:19.0.5-2.20260512165254.eb6ad61.el8ost |
| Red Hat openstack 16.2 | openstack-keystone | 1:16.0.3-2.20260616134936.9d699a7.el8ost |
| Red Hat openstack 16.2 | openstack-nova | 1:20.6.2-2.20260317135026.8a24acd.el8ost |
| Red Hat openstack 16.2 | openstack-nova-api | 1:20.6.2-2.20260317135026.8a24acd.el8ost |
| Red Hat openstack 16.2 | openstack-nova-common | 1:20.6.2-2.20260317135026.8a24acd.el8ost |
| Red Hat openstack 16.2 | openstack-nova-compute | 1:20.6.2-2.20260317135026.8a24acd.el8ost |
| Red Hat openstack 16.2 | openstack-nova-conductor | 1:20.6.2-2.20260317135026.8a24acd.el8ost |
| Red Hat openstack 16.2 | openstack-nova-console | 1:20.6.2-2.20260317135026.8a24acd.el8ost |
| Red Hat openstack 16.2 | openstack-nova-migration | 1:20.6.2-2.20260317135026.8a24acd.el8ost |
| Red Hat openstack 16.2 | openstack-nova-novncproxy | 1:20.6.2-2.20260317135026.8a24acd.el8ost |
| Red Hat openstack 16.2 | openstack-nova-scheduler | 1:20.6.2-2.20260317135026.8a24acd.el8ost |
| Red Hat openstack 16.2 | openstack-nova-serialproxy | 1:20.6.2-2.20260317135026.8a24acd.el8ost |
| Red Hat openstack 16.2 | openstack-nova-spicehtml5proxy | 1:20.6.2-2.20260317135026.8a24acd.el8ost |
| Red Hat openstack 16.2 | python-oslo-messaging | 0:10.2.4-2.20260710155333.82281a0.el8ost |
| Red Hat openstack 16.2 | python-pyasn1 | 0:0.4.6-4.el8ost |
| Red Hat openstack 16.2 | python3-glance | 1:19.0.5-2.20260512165254.eb6ad61.el8ost |
| Red Hat openstack 16.2 | python3-keystone | 1:16.0.3-2.20260616134936.9d699a7.el8ost |
| Red Hat openstack 16.2 | python3-nova | 1:20.6.2-2.20260317135026.8a24acd.el8ost |
| Red Hat openstack 16.2 | python3-oslo-messaging | 0:10.2.4-2.20260710155333.82281a0.el8ost |
| Red Hat openstack 16.2 | python3-pyasn1 | 0:0.4.6-4.el8ost |
| Red Hat openstack 16.2 | python3-pyasn1-modules | 0:0.4.6-4.el8ost |
| Ubuntu 16.04 LTS | python-oslo.messaging | no fix |
| Ubuntu 18.04 LTS | python-oslo.messaging | no fix |
| Ubuntu 20.04 LTS | python-oslo.messaging | no fix |
| Ubuntu 22.04 LTS | python-oslo.messaging | no fix |
| Ubuntu 24.04 LTS | python-oslo.messaging | no fix |
| Ubuntu 25.10 | python-oslo.messaging | no fix |
| Ubuntu 26.04 LTS | python-oslo.messaging | no fix |
| Ubuntu 26.10 | python-oslo.messaging | no fix |
| openSUSE Tumbleweed | python-oslo.messaging | 18.1.0-1.1 |