CVE-2026-76878
HighCVSS 8.4Exploitation Probability (EPSS)
Low risk36th percentile - higher than 36% of all known CVEs
Summary
In OpenStack Aodh before 22.0.1, the alarm list API bypasses project scoping when the all_projects parameter is set to false. A non-admin user with the reader role can list alarms from all projects, exposing sensitive data. Additionally, OpenStack Watcher does not enforce authorization on its webhook trigger endpoint, allowing authenticated users to start EVENT audits.
Risk Assessment
Data confidentiality breach – leakage of sensitive information (e.g., webhook URLs, project IDs) and potential unauthorized audit triggering, leading to uncontrolled actions in the cloud environment.
Recommendation
Update OpenStack Aodh to version 22.0.1 or later and apply patches for OpenStack Watcher to enforce authorization policies.
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Original NVD description (English source)
In OpenStack Aodh before 22.0.1, the alarm list API bypasses project scoping when the all_projects query parameter is set to false. The API checks for the presence of the all_projects key rather than its value; a true value enforces the administrator-only policy, but a false value removes the key and skips the branch that normally restricts results to the caller's project. A non-admin user with the reader role can list alarms from all projects, exposing alarm actions containing trust webhook URLs, Heat signal endpoints, project IDs, and user IDs. The parameter can also be combined with a foreign project_id to target a specific project's alarms. A related concern is that OpenStack Watcher does not apply authorization to its webhook trigger endpoint. Any authenticated user who learns an audit's webhook URL, for example from this leaked Aodh alarm metadata, can start an EVENT audit and its associated action plan regardless of their own project or role. The webhook endpoint has lacked policy enforcement since its introduction in the Ussuri release (Watcher 4.0.0).