CVE-2026-76878 Missing authorization in Aodh
Non-admin users can bypass project scoping in OpenStack Aodh to list alarms from all projects, exposing sensitive webhook URLs and enabling unauthorized audit triggers in Watcher.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-76878?
CVE-2026-76878 is a high-severity missing authorization vulnerability in OpenStack Aodh, published on 19 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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).
Weakness: CWE-688
Which versions are affected by CVE-2026-76878?
How do I fix CVE-2026-76878?
Upgrade to a fixed version.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-76878 being exploited?
There is no known exploitation of CVE-2026-76878 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-76878, GHSA-25rc-jgc5-f99w, UBUNTU-CVE-2026-76878, USN-8870-1.