============================================================================================ ============================================================================================
:Date: August 19, 2026 :CVE: CVE-2026-76878
Affects ~~~~~~~ - Aodh: >=10.0.0 <20.0.1, ==21.0.0, ==22.0.0 - Watcher: >=4.0.0 <14.1.2, >=15.0.0 <15.1.2, >=16.0.0 <16.0.2
Description ~~~~~~~~~~~ Chen YuXiang of the Institute of Computing Technology, Chinese Academy of Sciences reported that OpenStack Aodh does not enforce project scope on the alarm listing API when the allprojects query parameter is supplied with a false value. A non-admin user holding only the reader role can list alarms belonging to other projects, optionally targeting a specific project, exposing alarm metadata such as webhook action URLs, signal endpoints, and project identifiers. All Aodh deployments are affected.
The same reporter found 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 the Aodh alarm metadata leaked above, can start an EVENT audit and its associated action plan regardless of their own project or role. All Watcher deployments are affected.
Errata ~~~~~~ MITRE assigned CVE-2026-76878 after initial publication.
Patches ~~~~~~~ - https://review.opendev.org/1001503 (2025.1/epoxy (aodh)) - https://review.opendev.org/1001509 (2025.1/epoxy (watcher)) - https://review.opendev.org/1001502 (2025.2/flamingo (aodh)) - https://review.opendev.org/1001508 (2025.2/flamingo (watcher)) - https://review.opendev.org/1001501 (2026.1/gazpacho (aodh)) - https://review.opendev.org/1001507 (2026.1/gazpacho (watcher)) - https://review.opendev.org/1001500 (2026.2/hibiscus (development) (aodh)) Credits ~~~~~~~ References ~~~~~~~~~~ - https://launchpad.net/bugs/2161276 - https://launchpad.net/bugs/2161771 - http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-76878
OSSA History ~~~~~~~~~~~~ - 2026-08-20 - Errata 1 - 2026-08-19 - Original Version
-- Goutham Pacha Ravi OpenStack Vulnerability Management Team https://security.openstack.org/vmt.html
On 8/19/26 9:18 AM, Goutham Pacha Ravi wrote: ============================================================================================ ============================================================================================
:Date: August 19, 2026 :CVE: CVE-2026-pending
Affects ~~~~~~~ - Aodh: >=10.0.0 <20.0.1, ==21.0.0, ==22.0.0 - Watcher: >=4.0.0 <14.1.2, >=15.0.0 <15.1.2, >=16.0.0 <16.0.2
Description ~~~~~~~~~~~ Chen YuXiang of the Institute of Computing Technology, Chinese Academy of Sciences reported that OpenStack Aodh does not enforce project scope on the alarm listing API when the allprojects query parameter is supplied with a false value. A non-admin user holding only the reader role can list alarms belonging to other projects, optionally targeting a specific project, exposing alarm metadata such as webhook action URLs, signal endpoints, and project identifiers. All Aodh deployments are affected.
The same reporter found 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 the Aodh alarm metadata leaked above, can start an EVENT audit and its associated action plan regardless of their own project or role. All Watcher deployments are affected.
Patches ~~~~~~~ - https://review.opendev.org/1001503 (2025.1/epoxy (aodh)) - https://review.opendev.org/1001509 (2025.1/epoxy (watcher)) - https://review.opendev.org/1001502 (2025.2/flamingo (aodh)) - https://review.opendev.org/1001508 (2025.2/flamingo (watcher)) - https://review.opendev.org/1001501 (2026.1/gazpacho (aodh)) - https://review.opendev.org/1001507 (2026.1/gazpacho (watcher)) - https://review.opendev.org/1001500 (2026.2/hibiscus (development) (aodh)) Credits ~~~~~~~ References ~~~~~~~~~~ - https://launchpad.net/bugs/2161276 - https://launchpad.net/bugs/2161771 - http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-pending
Notes ~~~~~ - A CVE identifier was requested from MITRE for the aodh vulnerability on 2026-08-03. The CVE will be added to this advisory by errata once assigned.
-- Goutham Pacha Ravi OpenStack Vulnerability Management Team https://security.openstack.org/vmt.html
In OpenStack Aodh before 22.0.1, the alarm list API bypasses project scoping when the allprojects query parameter is set to false. The API checks for the presence of the allprojects 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 projectid 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).
============================================================================================ ============================================================================================
:Date: August 19, 2026 :CVE: CVE-2026-pending
Affects ~~~~~~~ - Aodh: >=10.0.0 <20.0.1, ==21.0.0, ==22.0.0 - Watcher: >=4.0.0 <14.1.2, >=15.0.0 <15.1.2, >=16.0.0 <16.0.2
Description ~~~~~~~~~~~ Chen YuXiang of the Institute of Computing Technology, Chinese Academy of Sciences reported that OpenStack Aodh does not enforce project scope on the alarm listing API when the allprojects query parameter is supplied with a false value. A non-admin user holding only the reader role can list alarms belonging to other projects, optionally targeting a specific project, exposing alarm metadata such as webhook action URLs, signal endpoints, and project identifiers. All Aodh deployments are affected.
The same reporter found 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 the Aodh alarm metadata leaked above, can start an EVENT audit and its associated action plan regardless of their own project or role. All Watcher deployments are affected.
Patches ~~~~~~~ - https://review.opendev.org/1001503 (2025.1/epoxy (aodh)) - https://review.opendev.org/1001509 (2025.1/epoxy (watcher)) - https://review.opendev.org/1001502 (2025.2/flamingo (aodh)) - https://review.opendev.org/1001508 (2025.2/flamingo (watcher)) - https://review.opendev.org/1001501 (2026.1/gazpacho (aodh)) - https://review.opendev.org/1001507 (2026.1/gazpacho (watcher)) - https://review.opendev.org/1001500 (2026.2/hibiscus (development) (aodh)) Credits ~~~~~~~ References ~~~~~~~~~~ - https://launchpad.net/bugs/2161276 - https://launchpad.net/bugs/2161771 - http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-pending
Notes ~~~~~ - A CVE identifier was requested from MITRE for the aodh vulnerability on 2026-08-03. The CVE will be added to this advisory by errata once assigned.
-- Goutham Pacha Ravi OpenStack Vulnerability Management Team https://security.openstack.org/vmt.html