CVE-2026-44393
CVE-2026-44393
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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.
CVSS 7.4 · High · EPSS 0.2% · Fix available
- Published
- Updated
Affected products and versions
n/a
- Versions
- n/a: Affected
No fix published
python-oslo.messaging Debian:12
- Versions
- 14.0.0-2
- Affected ranges
- ECOSYSTEM: < 14.0.3-0+deb12u1
Update to 14.0.3-0+deb12u1
python-oslo.messaging Debian:13
- Versions
- 16.1.0-3
- Affected ranges
- ECOSYSTEM: < 16.1.0-3+deb13u1
Update to 16.1.0-3+deb13u1
python-oslo.messaging Debian:14
- Versions
- 16.1.0-3
- 17.1.0-1
- 17.1.0-2
- 17.1.0-3
- 17.3.0-1
- 17.3.0-2
- 17.3.0-3
- Affected ranges
- ECOSYSTEM: < 17.3.0-4
Update to 17.3.0-4
oslo-messaging PyPI
- Versions
- 1.10.0
- 1.11.0
- 1.12.0
- 1.12.1
- 1.13.0
- 1.14.0
- 1.15.0
- 1.16.0
- 1.17.0
- 1.17.1
- 1.3.0
- 1.3.0a4
- 1.3.0a5
- 1.3.0a6
- 1.3.0a7
- 1.3.0a8
- 1.3.0a9
- 1.3.1
- 1.4.0
- 1.4.0.0a1
- 1.4.0.0a2
- 1.4.0.0a3
- 1.4.0.0a4
- 1.4.0.0a5
- 1.4.1
- 1.4.2
- 1.5.0
- 1.5.1
- 1.6.0
- 1.7.0
- 1.8.0
- 1.8.1
- 1.8.2
- 1.8.3
- 1.9.0
- 10.0.0
- 10.1.0
- 10.2.0
- 10.2.1
- 10.2.2
- 10.2.3
- 10.2.4
- 10.3.0
- 10.4.0
- 10.4.1
- 10.5.0
- 11.0.0
- 12.0.0
- 12.1.0
- 12.1.1
- 12.1.2
- 12.1.3
- 12.1.4
- 12.1.5
- 12.1.6
- 12.10.0
- 12.11.0
- 12.11.1
- 12.12.0
- 12.13.0
- 12.13.1
- 12.13.2
- 12.13.3
- 12.14.0
- 12.2.0
- 12.2.1
- 12.2.2
- 12.3.0
- 12.4.0
- 12.5.0
- 12.5.1
- 12.5.2
- 12.6.0
- 12.6.1
- 12.7.0
- 12.7.1
- 12.7.2
- 12.7.3
- 12.8.0
- 12.9.0
- 12.9.1
- 12.9.2
- 12.9.3
- 12.9.4
- 13.0.0
- 14.0.0
- 14.0.1
- 14.0.2
- 14.0.3
- 14.1.0
- 14.2.0
- 14.2.1
- 14.2.2
- 14.2.3
- 14.2.4
- 14.2.5
- 14.3.0
- 14.3.1
- 14.4.0
- 14.4.1
- 14.4.2
- 14.5.0
- 14.6.0
- 14.7.0
- 14.7.1
- 14.7.2
- 14.7.3
- 14.8.0
- 14.8.1
- 14.9.0
- 14.9.1
- 14.9.2
- 14.9.3
- 15.0.0
- 16.0.0
- 16.1.0
- 16.1.1
- 16.1.2
- 17.0.0
- 17.1.0
- 17.2.0
- 17.3.0
- 2.0.0
- 2.1.0
- 2.2.0
- 2.3.0
- 2.4.0
- 2.5.0
- 2.6.0
- 2.6.1
- 2.7.0
- 2.8.0
- 2.8.1
- 2.9.0
- 3.0.0
- 3.1.0
- 4.0.0
- 4.1.0
- 4.2.0
- 4.3.0
- 4.4.0
- 4.5.0
- 4.5.1
- 4.6.0
- 4.6.1
- 5.0.0
- 5.1.0
- 5.10.0
- 5.10.1
- 5.10.2
- 5.11.0
- 5.12.0
- 5.13.0
- 5.14.0
- 5.15.0
- 5.16.0
- 5.17.0
- 5.17.1
- 5.17.2
- 5.17.3
- 5.17.4
- 5.18.0
- 5.19.0
- 5.2.0
- 5.20.0
- 5.21.0
- 5.22.0
- 5.23.0
- 5.24.0
- 5.24.1
- 5.24.2
- 5.25.0
- 5.26.0
- 5.27.0
- 5.28.0
- 5.29.0
- 5.3.0
- 5.30.0
- 5.30.1
- 5.30.2
- 5.30.3
- 5.30.4
- 5.30.5
- 5.30.6
- 5.30.7
- 5.30.8
- 5.31.0
- 5.32.0
- 5.33.0
- 5.33.1
- 5.34.0
- 5.34.1
- 5.35.0
- 5.35.1
- 5.35.2
- 5.35.3
- 5.35.4
- 5.35.5
- 5.35.6
- 5.36.0
- 5.4.0
- 5.5.0
- 5.6.0
- 5.7.0
- 5.8.0
- 5.9.0
- 6.0.0
- 6.1.0
- 6.2.0
- 6.3.0
- 6.4.0
- 6.4.1
- 6.5.0
- 7.0.0
- 8.0.0
- 8.1.0
- 8.1.1
- 8.1.2
- 8.1.3
- 8.1.4
- 9.0.0
- 9.0.1
- 9.1.0
- 9.1.1
- 9.2.0
- 9.2.1
- 9.3.0
- 9.3.1
- 9.4.0
- 9.5.0
- 9.5.1
- 9.5.2
- 9.6.0
- 9.7.0
- 9.7.1
- 9.7.2
- 9.8.0
- Affected ranges
- ECOSYSTEM: ≥ 1.0.0, ≤ 17.3.0
No fix published
python-oslo.messaging Ubuntu:16.04:LTS
- Versions
- 2.5.0-1ubuntu1
- 3.0.0-1ubuntu2
- 4.5.0-1ubuntu1
- 4.5.1-1ubuntu1
- 4.6.1-2ubuntu1
- 4.6.1-2ubuntu2
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
python-oslo.messaging Ubuntu:18.04:LTS
- Versions
- 5.30.0-0ubuntu1
- 5.33.1-0ubuntu1
- 5.34.1-0ubuntu1
- 5.35.0-0ubuntu1
- 5.35.0-0ubuntu2
- 5.35.0-0ubuntu3
- 5.35.0-0ubuntu4
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
python-oslo.messaging Ubuntu:20.04:LTS
- Versions
- 9.7.1-0ubuntu3
- 10.4.0-0ubuntu2
- 10.5.0-0ubuntu1
- 11.0.0-0ubuntu1
- 12.1.0-0ubuntu1
- 12.1.6-0ubuntu1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
python-oslo.messaging Ubuntu:22.04:LTS
- Versions
- 12.9.1-0ubuntu4
- 12.11.0-0ubuntu1
- 12.11.1-0ubuntu1
- 12.13.0-0ubuntu1
- 12.13.0-0ubuntu1.1
- 12.13.0-0ubuntu1.2
- 12.13.0-0ubuntu1.3
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
python-oslo.messaging Ubuntu:24.04:LTS
- Versions
- 14.4.1-0ubuntu1
- 14.6.0-0ubuntu1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
python-oslo.messaging Ubuntu:25.10
- Versions
- 16.1.0-0ubuntu1
- 17.1.0-0ubuntu1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
python-oslo.messaging Ubuntu:26.10
- Versions
- 17.3.0-2ubuntu1
- 18.2.0-0ubuntu1
- 18.2.0-0ubuntu3
- 18.3.0-0ubuntu1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
python-oslo.messaging Ubuntu:26.04:LTS
- Versions
- 17.1.0-0ubuntu1
- 17.2.0-0ubuntu1
- 17.3.0-2ubuntu1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
Original sources
- https://bugs.launchpad.net/oslo.messaging/+bug/2150316
- https://wiki.openstack.org/wiki/OSSN/OSSN-0096
- 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
- https://access.redhat.com/errata/RHSA-2026:54757
- https://nvd.nist.gov/vuln/detail/CVE-2026-44393