PYSEC-2026-3492
See a problem?- Import Source
- https://github.com/pypa/advisory-database/blob/main/vulns/oslo-messaging/PYSEC-2026-3492.yaml
- JSON Data
- https://api.osv.dev/v1/vulns/PYSEC-2026-3492
- Aliases
-
- CVE-2026-44393
- GHSA-76qh-xr7q-h39m
- Published
- 2026-07-23T11:41:38.572568Z
- Modified
- 2026-07-28T09:15:10.483381962Z
- Severity
-
- 7.4 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N CVSS Calculator
- Summary
- OpenStack oslo.messaging does not verify RabbitMQ broker hostname during TLS handshake
- Details
-
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 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.
- References
-
- https://nvd.nist.gov/vuln/detail/CVE-2026-44393
- https://access.redhat.com/security/cve/CVE-2026-44393
- https://bugs.launchpad.net/oslo.messaging/+bug/2150316
- https://bugzilla.redhat.com/show_bug.cgi?id=2484835
- https://github.com/openstack/oslo.messaging
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44393.json
- https://wiki.openstack.org/wiki/OSSN/OSSN-0096
- https://pypi.org/project/oslo-messaging
- https://github.com/advisories/GHSA-76qh-xr7q-h39m
Affected packages
PyPI / oslo-messaging
Package
- Name
- oslo-messaging
- View open source insights on deps.dev
- Purl
- pkg:pypi/oslo-messaging
Affected versions
1.*
1.3.0a4
1.3.0a5
1.3.0a6
1.3.0a7
1.3.0a8
1.3.0a9
1.3.0
1.3.1
1.4.0.0a1
1.4.0.0a2
1.4.0.0a3
1.4.0.0a4
1.4.0.0a5
1.4.0
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
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
2.*
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.*
3.0.0
3.1.0
4.*
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.*
5.0.0
5.1.0
5.2.0
5.3.0
5.4.0
5.5.0
5.6.0
5.7.0
5.8.0
5.9.0
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
5.20.0
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
5.30.0
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
6.*
6.0.0
6.1.0
6.2.0
6.3.0
6.4.0
6.4.1
6.5.0
7.*
7.0.0
8.*
8.0.0
8.1.0
8.1.1
8.1.2
8.1.3
8.1.4
9.*
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
10.*
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.*
11.0.0
12.*
12.0.0
12.1.0
12.1.1
12.1.2
12.1.3
12.1.4
12.1.5
12.1.6
12.2.0
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
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
13.*
13.0.0
14.*
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.*
15.0.0
16.*
16.0.0
16.1.0
16.1.1
16.1.2
17.*
17.0.0
17.1.0
17.2.0
17.3.0