# CVE-2026-76878: watcher: In OpenStack Aodh before 22.0.1, the alarm list API bypasses project scoping when the all_projects query parameter is...

CVE-2026-76878 is fixed in 14 products on 1 platform, first by aodh-api 10.0.0-0ubuntu0.20.04.1+esm1, released August 19, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-76878
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.0054
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Aug 19, 2026

## 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).

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | aodh Debian 14 | 22.0.0-3 | [DEBIAN-CVE-2026-76878](https://patchblox.com/security/data/fix/linux/debian-cve-2026-76878.md) | Aug 22, 2026 |
| Linux | aodh-api Ubuntu 20.04 LTS (focal) | 10.0.0-0ubuntu0.20.04.1+esm1 | [aodh-api 10.0.0-0ubuntu0.20.04.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-aodh-api-10.0.0-0ubuntu0.20.04.1-esm1.md) | Aug 19, 2026 |
| Linux | aodh-api Ubuntu 22.04.1 LTS (jammy) | 1:14.1.0-0ubuntu1.1 | [aodh-api 1:14.1.0-0ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-aodh-api-1-14.1.0-0ubuntu1.1.md) | Aug 19, 2026 |
| Linux | aodh-api Ubuntu 24.04.5 LTS (noble) | 1:18.0.0-0ubuntu1.1 | [aodh-api 1:18.0.0-0ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-aodh-api-1-18.0.0-0ubuntu1.1.md) | Aug 19, 2026 |
| Linux | aodh-api Ubuntu 26.04.1 LTS (resolute) | 1:22.0.0-0ubuntu1.1 | [aodh-api 1:22.0.0-0ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-aodh-api-1-22.0.0-0ubuntu1.1.md) | Aug 19, 2026 |
| Linux | aodh-common Ubuntu 20.04 LTS (focal) | 10.0.0-0ubuntu0.20.04.1+esm1 | [aodh-common 10.0.0-0ubuntu0.20.04.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-aodh-common-10.0.0-0ubuntu0.20.04.1-esm1.md) | Aug 19, 2026 |
| Linux | aodh-common Ubuntu 22.04.1 LTS (jammy) | 1:14.1.0-0ubuntu1.1 | [aodh-common 1:14.1.0-0ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-aodh-common-1-14.1.0-0ubuntu1.1.md) | Aug 19, 2026 |
| Linux | aodh-common Ubuntu 24.04.5 LTS (noble) | 1:18.0.0-0ubuntu1.1 | [aodh-common 1:18.0.0-0ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-aodh-common-1-18.0.0-0ubuntu1.1.md) | Aug 19, 2026 |
| Linux | aodh-common Ubuntu 26.04.1 LTS (resolute) | 1:22.0.0-0ubuntu1.1 | [aodh-common 1:22.0.0-0ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-aodh-common-1-22.0.0-0ubuntu1.1.md) | Aug 19, 2026 |
| Linux | aodh-evaluator Ubuntu 20.04 LTS (focal) | 10.0.0-0ubuntu0.20.04.1+esm1 | [aodh-evaluator 10.0.0-0ubuntu0.20.04.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-aodh-evaluator-10.0.0-0ubuntu0.20.04.1-esm1.md) | Aug 19, 2026 |
| Linux | aodh-evaluator Ubuntu 22.04.1 LTS (jammy) | 1:14.1.0-0ubuntu1.1 | [aodh-evaluator 1:14.1.0-0ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-aodh-evaluator-1-14.1.0-0ubuntu1.1.md) | Aug 19, 2026 |
| Linux | aodh-evaluator Ubuntu 24.04.5 LTS (noble) | 1:18.0.0-0ubuntu1.1 | [aodh-evaluator 1:18.0.0-0ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-aodh-evaluator-1-18.0.0-0ubuntu1.1.md) | Aug 19, 2026 |
| Linux | aodh-evaluator Ubuntu 26.04.1 LTS (resolute) | 1:22.0.0-0ubuntu1.1 | [aodh-evaluator 1:22.0.0-0ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-aodh-evaluator-1-22.0.0-0ubuntu1.1.md) | Aug 19, 2026 |
| Linux | aodh-expirer Ubuntu 20.04 LTS (focal) | 10.0.0-0ubuntu0.20.04.1+esm1 | [aodh-expirer 10.0.0-0ubuntu0.20.04.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-aodh-expirer-10.0.0-0ubuntu0.20.04.1-esm1.md) | Aug 19, 2026 |
| Linux | aodh-expirer Ubuntu 22.04.1 LTS (jammy) | 1:14.1.0-0ubuntu1.1 | [aodh-expirer 1:14.1.0-0ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-aodh-expirer-1-14.1.0-0ubuntu1.1.md) | Aug 19, 2026 |
| Linux | aodh-expirer Ubuntu 24.04.5 LTS (noble) | 1:18.0.0-0ubuntu1.1 | [aodh-expirer 1:18.0.0-0ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-aodh-expirer-1-18.0.0-0ubuntu1.1.md) | Aug 19, 2026 |
| Linux | aodh-expirer Ubuntu 26.04.1 LTS (resolute) | 1:22.0.0-0ubuntu1.1 | [aodh-expirer 1:22.0.0-0ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-aodh-expirer-1-22.0.0-0ubuntu1.1.md) | Aug 19, 2026 |
| Linux | aodh-listener Ubuntu 20.04 LTS (focal) | 10.0.0-0ubuntu0.20.04.1+esm1 | [aodh-listener 10.0.0-0ubuntu0.20.04.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-aodh-listener-10.0.0-0ubuntu0.20.04.1-esm1.md) | Aug 19, 2026 |
| Linux | aodh-listener Ubuntu 22.04.1 LTS (jammy) | 1:14.1.0-0ubuntu1.1 | [aodh-listener 1:14.1.0-0ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-aodh-listener-1-14.1.0-0ubuntu1.1.md) | Aug 19, 2026 |
| Linux | aodh-listener Ubuntu 24.04.5 LTS (noble) | 1:18.0.0-0ubuntu1.1 | [aodh-listener 1:18.0.0-0ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-aodh-listener-1-18.0.0-0ubuntu1.1.md) | Aug 19, 2026 |
| Linux | aodh-listener Ubuntu 26.04.1 LTS (resolute) | 1:22.0.0-0ubuntu1.1 | [aodh-listener 1:22.0.0-0ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-aodh-listener-1-22.0.0-0ubuntu1.1.md) | Aug 19, 2026 |
| Linux | aodh-notifier Ubuntu 20.04 LTS (focal) | 10.0.0-0ubuntu0.20.04.1+esm1 | [aodh-notifier 10.0.0-0ubuntu0.20.04.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-aodh-notifier-10.0.0-0ubuntu0.20.04.1-esm1.md) | Aug 19, 2026 |
| Linux | aodh-notifier Ubuntu 22.04.1 LTS (jammy) | 1:14.1.0-0ubuntu1.1 | [aodh-notifier 1:14.1.0-0ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-aodh-notifier-1-14.1.0-0ubuntu1.1.md) | Aug 19, 2026 |
| Linux | aodh-notifier Ubuntu 24.04.5 LTS (noble) | 1:18.0.0-0ubuntu1.1 | [aodh-notifier 1:18.0.0-0ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-aodh-notifier-1-18.0.0-0ubuntu1.1.md) | Aug 19, 2026 |
| Linux | aodh-notifier Ubuntu 26.04.1 LTS (resolute) | 1:22.0.0-0ubuntu1.1 | [aodh-notifier 1:22.0.0-0ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-aodh-notifier-1-22.0.0-0ubuntu1.1.md) | Aug 19, 2026 |
| Linux | python3-aodh Ubuntu 20.04 LTS (focal) | 10.0.0-0ubuntu0.20.04.1+esm1 | [python3-aodh 10.0.0-0ubuntu0.20.04.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-python3-aodh-10.0.0-0ubuntu0.20.04.1-esm1.md) | Aug 19, 2026 |
| Linux | python3-aodh Ubuntu 22.04.1 LTS (jammy) | 1:14.1.0-0ubuntu1.1 | [python3-aodh 1:14.1.0-0ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-python3-aodh-1-14.1.0-0ubuntu1.1.md) | Aug 19, 2026 |
| Linux | python3-aodh Ubuntu 24.04.5 LTS (noble) | 1:18.0.0-0ubuntu1.1 | [python3-aodh 1:18.0.0-0ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-python3-aodh-1-18.0.0-0ubuntu1.1.md) | Aug 19, 2026 |
| Linux | python3-aodh Ubuntu 26.04.1 LTS (resolute) | 1:22.0.0-0ubuntu1.1 | [python3-aodh 1:22.0.0-0ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-python3-aodh-1-22.0.0-0ubuntu1.1.md) | Aug 19, 2026 |
| Linux | python3-watcher Ubuntu 20.04 LTS (focal) | 1:4.0.0-0ubuntu0.20.04.1+esm1 | [python3-watcher 1:4.0.0-0ubuntu0.20.04.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-python3-watcher-1-4.0.0-0ubuntu0.20.04.1-esm1.md) | Aug 19, 2026 |
| Linux | python3-watcher Ubuntu 22.04.1 LTS (jammy) | 2:8.0.0-0ubuntu1.2+esm1 | [python3-watcher 2:8.0.0-0ubuntu1.2+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-python3-watcher-2-8.0.0-0ubuntu1.2-esm1.md) | Aug 19, 2026 |
| Linux | python3-watcher Ubuntu 24.04.5 LTS (noble) | 2:12.0.0-0ubuntu1.3+esm1 | [python3-watcher 2:12.0.0-0ubuntu1.3+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-python3-watcher-2-12.0.0-0ubuntu1.3-esm1.md) | Aug 19, 2026 |
| Linux | python3-watcher Ubuntu 26.04.1 LTS (resolute) | 2:16.0.0-0ubuntu1+esm1 | [python3-watcher 2:16.0.0-0ubuntu1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-python3-watcher-2-16.0.0-0ubuntu1-esm1.md) | Aug 19, 2026 |
| Linux | watcher Debian 14 | 16.0.0-5 | [DEBIAN-CVE-2026-76878](https://patchblox.com/security/data/fix/linux/debian-cve-2026-76878.md) | Aug 22, 2026 |
| Linux | watcher-api Ubuntu 20.04 LTS (focal) | 1:4.0.0-0ubuntu0.20.04.1+esm1 | [watcher-api 1:4.0.0-0ubuntu0.20.04.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-watcher-api-1-4.0.0-0ubuntu0.20.04.1-esm1.md) | Aug 19, 2026 |
| Linux | watcher-api Ubuntu 22.04.1 LTS (jammy) | 2:8.0.0-0ubuntu1.2+esm1 | [watcher-api 2:8.0.0-0ubuntu1.2+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-watcher-api-2-8.0.0-0ubuntu1.2-esm1.md) | Aug 19, 2026 |
| Linux | watcher-api Ubuntu 24.04.5 LTS (noble) | 2:12.0.0-0ubuntu1.3+esm1 | [watcher-api 2:12.0.0-0ubuntu1.3+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-watcher-api-2-12.0.0-0ubuntu1.3-esm1.md) | Aug 19, 2026 |
| Linux | watcher-api Ubuntu 26.04.1 LTS (resolute) | 2:16.0.0-0ubuntu1+esm1 | [watcher-api 2:16.0.0-0ubuntu1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-watcher-api-2-16.0.0-0ubuntu1-esm1.md) | Aug 19, 2026 |
| Linux | watcher-applier Ubuntu 20.04 LTS (focal) | 1:4.0.0-0ubuntu0.20.04.1+esm1 | [watcher-applier 1:4.0.0-0ubuntu0.20.04.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-watcher-applier-1-4.0.0-0ubuntu0.20.04.1-esm1.md) | Aug 19, 2026 |
| Linux | watcher-applier Ubuntu 22.04.1 LTS (jammy) | 2:8.0.0-0ubuntu1.2+esm1 | [watcher-applier 2:8.0.0-0ubuntu1.2+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-watcher-applier-2-8.0.0-0ubuntu1.2-esm1.md) | Aug 19, 2026 |
| Linux | watcher-applier Ubuntu 24.04.5 LTS (noble) | 2:12.0.0-0ubuntu1.3+esm1 | [watcher-applier 2:12.0.0-0ubuntu1.3+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-watcher-applier-2-12.0.0-0ubuntu1.3-esm1.md) | Aug 19, 2026 |
| Linux | watcher-applier Ubuntu 26.04.1 LTS (resolute) | 2:16.0.0-0ubuntu1+esm1 | [watcher-applier 2:16.0.0-0ubuntu1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-watcher-applier-2-16.0.0-0ubuntu1-esm1.md) | Aug 19, 2026 |
| Linux | watcher-common Ubuntu 20.04 LTS (focal) | 1:4.0.0-0ubuntu0.20.04.1+esm1 | [watcher-common 1:4.0.0-0ubuntu0.20.04.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-watcher-common-1-4.0.0-0ubuntu0.20.04.1-esm1.md) | Aug 19, 2026 |
| Linux | watcher-common Ubuntu 22.04.1 LTS (jammy) | 2:8.0.0-0ubuntu1.2+esm1 | [watcher-common 2:8.0.0-0ubuntu1.2+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-watcher-common-2-8.0.0-0ubuntu1.2-esm1.md) | Aug 19, 2026 |
| Linux | watcher-common Ubuntu 24.04.5 LTS (noble) | 2:12.0.0-0ubuntu1.3+esm1 | [watcher-common 2:12.0.0-0ubuntu1.3+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-watcher-common-2-12.0.0-0ubuntu1.3-esm1.md) | Aug 19, 2026 |
| Linux | watcher-common Ubuntu 26.04.1 LTS (resolute) | 2:16.0.0-0ubuntu1+esm1 | [watcher-common 2:16.0.0-0ubuntu1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-watcher-common-2-16.0.0-0ubuntu1-esm1.md) | Aug 19, 2026 |
| Linux | watcher-decision-engine Ubuntu 20.04 LTS (focal) | 1:4.0.0-0ubuntu0.20.04.1+esm1 | [watcher-decision-engine 1:4.0.0-0ubuntu0.20.04.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-watcher-decision-engine-1-4.0.0-0ubuntu0.20.04.1-esm1.md) | Aug 19, 2026 |
| Linux | watcher-decision-engine Ubuntu 22.04.1 LTS (jammy) | 2:8.0.0-0ubuntu1.2+esm1 | [watcher-decision-engine 2:8.0.0-0ubuntu1.2+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-watcher-decision-engine-2-8.0.0-0ubuntu1.2-esm1.md) | Aug 19, 2026 |
| Linux | watcher-decision-engine Ubuntu 24.04.5 LTS (noble) | 2:12.0.0-0ubuntu1.3+esm1 | [watcher-decision-engine 2:12.0.0-0ubuntu1.3+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-watcher-decision-engine-2-12.0.0-0ubuntu1.3-esm1.md) | Aug 19, 2026 |
| Linux | watcher-decision-engine Ubuntu 26.04.1 LTS (resolute) | 2:16.0.0-0ubuntu1+esm1 | [watcher-decision-engine 2:16.0.0-0ubuntu1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-watcher-decision-engine-2-16.0.0-0ubuntu1-esm1.md) | Aug 19, 2026 |

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Data as of 2026-11-08T13:06:02Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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