CVE-2026-93856CWE-669

CVE-2026-93856

Medium · published October 21, 2026

CVSS v3.1
4.3
EPSS
0%
Percentile
23.1
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
4.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00314 · 23.1th percentile
Weakness
CWE-669 · Incorrect Resource Transfer Between Spheres
Published
2026-10-21T10:16Z
References (5)
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]http://www.openwall.com/lists/oss-security/2026/10/20/17 · af854a3a-2127-422b-91ae-364da2661108https://bugs.launchpad.net/cinder/+bug/2160671 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 22 OCT 03:36Z
    EPSS moved — → 0%
    epss
  • 21 OCT 05:36Z
    In OpenStack Cinder through 29.0.0, cross-project information disclosure can occur in the Messages API
    cvelistv5
  • 21 OCT 05:36Z
    In OpenStack Cinder through 29.0.0, cross-project information disclosure can occur in the Messages API
    cvelistv5