oslo.messaging: openstack: OpenStack oslo.messaging: Man-in-the-middle attack via improper TLS hostname verification

A flaw was found in OpenStack oslo.messaging. The RabbitMQ driver does not properly verify the hostname of the message broker when establishing a TLS Transport Layer Security connection. An attacker capable of intercepting control-plane network traffic can exploit this vulnerability to impersonat...

CVE-2026-44393

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 sslcafile is configured, the driver enables certificate chain validation but does not pass the expect...

CVE-2026-44393

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 sslcafile is configured, the driver enables certificate chain validation but does not pass the expect...

Improper Certificate Validation

Overview oslo.messaging is an Oslo Messaging API Affected versions of this package are vulnerable to Improper Certificate Validation in the TLS connection establishment process due to missing hostname verification in the RabbitMQ driver. An attacker can compromise the confidentiality and integrit...

PT-2026-46260

Name of the Vulnerable Software and Affected Versions oslo.messaging versions 1.0.0 through 17.3.0 Description The RabbitMQ driver in oslo.messaging fails to perform TLS hostname verification when connecting to the message broker. While the driver enables certificate chain validation when ssl ca...