Is CVE-2026-44393 actively exploited?

No active exploitation of CVE-2026-44393 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-44393 be exploited remotely?

Yes. CVE-2026-44393 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-44393?

CVE-2026-44393 has a CVSS score of 7.4 (HIGH).

HOME VULNERABILITIESCVE-2026-44393

HIGH

CVE-2026-44393

CWE-297Published: June 4, 2026· Updated: Jun 4, 2026

7.4

CVSS v3.1

Official Description

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.

NVD Source

Technical Analysis

CVE-2026-44393 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), with a CVSS base score of 7.4.