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CVE-2026-93856 Details

Description

In OpenStack Cinder through 29.0.0, cross-project information disclosure can occur in the Messages API. A non-admin user with the project-scoped 'member' or 'reader' role making the Block Storage API v3.3 "List messages" call finds the non-expired user messages for other projects included in the response, resulting in the leakage of UUIDs of resources owned by other projects, in addition to the user message about the other projects' resources (which, by design, are sanitized generic messages). All Cinder deployments are affected.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:4.3 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://bugs.launchpad.net/cinder/+bug/2160671	CISA-ADP
http://www.openwall.com/lists/oss-security/2026/10/20/17	CVE
https://bugs.launchpad.net/cinder/+bug/2160671	[email protected]
https://security.openstack.org/ossa/OSSA-2026-045.html	[email protected]
https://www.openwall.com/lists/oss-security/2026/10/20/17	[email protected]

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-669	Incorrect Resource Transfer Between Spheres	[email protected]

Affected Products

No affected product data is available for this CVE.

Change History

3 change records found show changes

Date	Action	Recorded By
Oct 21, 2026	CVE Modified	CISA-ADP
Oct 21, 2026	CVE Modified	CVE
Oct 21, 2026	New CVE Received	[email protected]