Bug 2524772 (CVE-2026-80183)

Summary: CVE-2026-80183 keystone: OpenStack Keystone: Information disclosure via improper handling of domain IDs in role assignment listings
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: eglynn, jjoyce, jpretori, jschluet, lhh, mburns, mgarciac
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in OpenStack Keystone. An authenticated user with a 'reader' role on any project can exploit a vulnerability in the `/v3/role_assignments` endpoint. By providing a domain ID with the 'include_subtree' parameter, the user can list all project-scoped role assignments across any domain. This leads to the disclosure of names and home-domain IDs for users, groups, projects, and roles throughout the cloud infrastructure.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Description OSIDB Bzimport 2026-08-27 00:22:43 UTC 
In OpenStack Keystone before 29.0.3, any authenticated user holding role:reader on any project can list every project-scoped role assignment under any domain by passing a domain ID as scope.project.id with include_subtree to the GET /v3/role_assignments endpoint. The domain's project record has domain_id=null, causing the policy domain_id check to pass for any caller. With include_names, the response discloses the names and home-domain IDs of every user, group, project, and role involved. The literal "default" domain ID works against any deployment created with keystone-manage bootstrap. An attacker can harvest domain IDs from the response and repeat the query to map role assignments across the entire cloud. This is caused by misuse of "None" in 

list_role_assignments_for_tree.