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TI-2026-32343 Aliases CVE-2026-44393GHSA-76qh-xr7q-h39m

An issue was discovered in OpenStack oslo.messaging 1.0.0 through 17.3.0.

Priority LOW 32CWE-297Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
Spoofing
Confidentiality · integrity · availability
High · High · None
Fix status
Partial Red Hat: 1 fixed, 2 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-295.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00172 6th percentileScored 2026-11-07
Fix Partial Red Hat: 1 advisoryRed Hat: 1 fixed, 2 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
—oslo.messaging (PyPI)1.0.0 – 17.3.0—No fix listedGHSA-76qh-xr7q-h39m
  • — Vendor— Affected all versions Fixed in — No fix listed CNA
  • oslo.messaging (PyPI) Vendor— Affected 1.0.0 – 17.3.0 Fixed in — No fix listed GHSA-76qh-xr7q-h39m

Remediation

Red Hat 1 advisory

  • RHSA-2026:54757 Released 2026-08-13 · Red Hat rating Important
    Red Hat OpenStack Platform 16.2 security advisory
    • Red Hat OpenStack Platform 16.2 collectd-sensubility-0.2.1-1.1.el8ost, erlang-23.3.4.18-2.el8ost, erlang-asn1-23.3.4.18-2.el8ost +41

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat OpenStack Platform 17.1AffectedNo fix yet
Red Hat OpenStack Platform 18.0AffectedNo fix yet
Red Hat OpenStack Platform 16.2Fixed RHSA-2026:54757
Not affected: 2 products
  • Red Hat OpenShift Container Platform 4
  • Red Hat OpenStack Platform 16.2

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-44393
  2. 2026-10-03 Alias added: GHSA-76qh-xr7q-h39m

References

Advisory 1

Other 6

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences