Improper Certificate Validation Affecting oslo.messaging package, versions [,18.0.0)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-PYTHON-OSLOMESSAGING-17675096
- published29 Jun 2026
- disclosed4 Jun 2026
- creditUnknown
Introduced: 4 Jun 2026
CVE-2026-44393 (opens in a new tab)How to fix?
Upgrade oslo.messaging to version 18.0.0 or higher.
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 integrity of sensitive RPC and notification data by intercepting control-plane network traffic and impersonating the message broker.
Workaround
This vulnerability can be mitigated by restricting network access to the RabbitMQ message broker and configuring firewall rules to permit inbound connections only from authorized hosts and services within the control plane.