CVE-2026-93856
In OpenStack Cinder through 29.0.0, cross-project information disclosure can occur in the...
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
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.
- Record
CVE-2026-93856- CVSS 3.1
- 4.3 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N - Weakness
- CWE-669
- Updated
- 2026-11-02
EUVDEUVD-2026-107047
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.
- Record
EUVD-2026-107047- CVSS 3.1
- 4.3 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-rgvg-xc9j-2jxv
In OpenStack Cinder through 29.0.0, cross-project information disclosure can occur in the...
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.
- Record
GHSA-rgvg-xc9j-2jxv- CVSS 3.1
- 4.3 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N - Weakness
- CWE-669
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2026-93856- CVSS 3.1
- 4.3 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N - Weakness
- CWE-669
- Updated
- 2026-11-02
OSV
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.
- Record
CVE-2026-93856- CVSS 3.1
- 4.3 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N - Weakness
- CWE-669
- Updated
- 2026-11-02
OSVDEBIAN-CVE-2026-93856
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.
- Record
DEBIAN-CVE-2026-93856- CVSS 3.1
- 4.3 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N - Updated
- 2026-11-02
OSVUBUNTU-CVE-2026-93856
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.
- Record
UBUNTU-CVE-2026-93856- CVSS 3.1
- 4.3 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
cinderDebian:12 |
All versions, plus listed versions 2:21.1.0-32:21.3.1-1~deb12u12:22.0.0-12:22.0.0-22:22.0.0-3 Show 45 moreShow less2:22.0.0-42:22.0.0-52:22.0.0-62:22.0.0~rc1-12:23.0.0-12:23.0.0-22:23.0.0-32:23.0.0-42:23.0.0~rc1-12:24.0.0-12:24.0.0-22:24.0.0-32:24.0.0-52:24.0.0-62:24.0.0-72:24.0.0-82:24.0.0~rc1-12:25.0.0-12:25.0.0-22:25.0.0-32:25.0.0-42:25.0.0-52:25.0.0-62:25.0.0-72:25.0.0~rc1-12:25.0.0~rc1-22:25.1.0-12:26.0.0-12:26.0.0-1.12:26.0.0-22:26.0.0~rc1-12:26.0.0~rc1-22:26.0.0~rc2-12:26.0.0~rc2-22:27.0.0-12:27.0.0-22:27.0.0-32:27.0.0-42:27.0.0-52:27.0.0-62:27.0.0~rc1-12:27.0.0~rc1-22:27.0.0~rc1-32:28.0.0-12:28.0.0~rc1-1 |
None known |
cinderDebian:13 |
All versions, plus listed versions 2:26.0.0-22:27.0.0-12:27.0.0-22:27.0.0-32:27.0.0-4 Show 15 moreShow less2:27.0.0-52:27.0.0-62:27.0.0~rc1-12:27.0.0~rc1-22:27.0.0~rc1-32:28.0.0-12:28.0.0~rc1-12:28.0.0~rc1-22:28.0.0~rc1-32:28.0.0~rc2-12:29.0.0-12:29.0.0-22:29.0.0-32:29.0.0~rc1-12:29.0.0~rc1-2 |
None known |
cinderDebian:14 |
before 2:29.0.0-3, plus listed versions 2:26.0.0-22:27.0.0-12:27.0.0-22:27.0.0-32:27.0.0-4 Show 14 moreShow less2:27.0.0-52:27.0.0-62:27.0.0~rc1-12:27.0.0~rc1-22:27.0.0~rc1-32:28.0.0-12:28.0.0~rc1-12:28.0.0~rc1-22:28.0.0~rc1-32:28.0.0~rc2-12:29.0.0-12:29.0.0-22:29.0.0~rc1-12:29.0.0~rc1-2 |
2:29.0.0-3 |
cinderUbuntu:16.04:LTS |
All versions, plus listed versions 2:7.0.0-0ubuntu12:8.0.0~b1-0ubuntu12:8.0.0~b2-0ubuntu22:8.0.0~b3-0ubuntu22:8.0.0~rc1-0ubuntu2 Show 4 moreShow less2:8.0.0-0ubuntu12:8.1.0-0ubuntu12:8.1.1-0ubuntu12:8.1.1-0ubuntu3 |
None known |
cinderUbuntu:Pro:18.04:LTS |
All versions, plus listed versions 2:11.0.0-0ubuntu22:11.0.0-0ubuntu32:12.0.0~b1-0ubuntu12:12.0.0~b2-0ubuntu22:12.0.0~rc1-0ubuntu1 Show 14 moreShow less2:12.0.0~rc2-0ubuntu12:12.0.0~rc2-0ubuntu22:12.0.0-0ubuntu12:12.0.1-0ubuntu12:12.0.3-0ubuntu12:12.0.4-0ubuntu12:12.0.5-0ubuntu12:12.0.7-0ubuntu22:12.0.9-0ubuntu12:12.0.9-0ubuntu1.22:12.0.10-0ubuntu12:12.0.10-0ubuntu22:12.0.10-0ubuntu2.22:12.0.10-0ubuntu2.2+esm1 |
None known |
cinderUbuntu:20.04:LTS |
All versions, plus listed versions 2:15.0.0-0ubuntu12:16.0.0~b2~git2020020407.819b4a0fc-0ubuntu12:16.0.0~b3~git2020032414.a0c0a9e23-0ubuntu12:16.0.0~b3~git2020041012.eb915e2db-0ubuntu12:16.0.0-0ubuntu0.20.04.1 Show 16 moreShow less2:16.1.0-0ubuntu12:16.2.0-0ubuntu12:16.2.1-0ubuntu12:16.2.1-0ubuntu22:16.3.0-0ubuntu12:16.4.0-0ubuntu12:16.4.1-0ubuntu12:16.4.2-0ubuntu22:16.4.2-0ubuntu2.12:16.4.2-0ubuntu2.22:16.4.2-0ubuntu2.32:16.4.2-0ubuntu2.42:16.4.2-0ubuntu2.52:16.4.2-0ubuntu2.62:16.4.2-0ubuntu2.82:16.4.2-0ubuntu2.9 |
None known |
cinderUbuntu:22.04:LTS |
All versions, plus listed versions 2:19.0.0-0ubuntu22:19.0.0+git2022030310.b49fb59a6-0ubuntu12:19.0.0+git2022030310.b49fb59a6-0ubuntu22:20.0.0-0ubuntu12:20.0.1-0ubuntu1 Show 12 moreShow less2:20.1.0-0ubuntu12:20.1.0-0ubuntu2.12:20.1.0-0ubuntu2.22:20.2.0-0ubuntu12:20.2.0-0ubuntu1.12:20.3.0-0ubuntu12:20.3.1-0ubuntu12:20.3.1-0ubuntu1.12:20.3.1-0ubuntu1.22:20.3.1-0ubuntu1.42:20.3.1-0ubuntu1.52:20.3.1-0ubuntu1.6 |
None known |
cinderUbuntu:24.04:LTS |
All versions, plus listed versions 2:23.0.0-0ubuntu12:23.0.0-0ubuntu32:23.0.0+git2024011915.b8cd101f-0ubuntu12:23.0.0+git2024011915.b8cd101f-0ubuntu22:24.0.0~rc1-0ubuntu1 Show 6 moreShow less2:24.0.0-0ubuntu12:24.0.0-0ubuntu1.22:24.0.0-0ubuntu1.32:24.2.0-0ubuntu12:24.2.0-0ubuntu22:24.2.0-0ubuntu2.1 |
None known |
cinderUbuntu:26.10 |
All versions, plus listed versions 2:28.0.0-0ubuntu12:28.0.0+git20260815.248.2a29bac-0ubuntu12:29.0.0~rc1-0ubuntu12:29.0.0-0ubuntu1 |
None known |
cinderUbuntu:26.04:LTS |
All versions, plus listed versions 2:27.0.0-0ubuntu12:28.0.0~rc1-0ubuntu22:28.0.0-0ubuntu1 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-93856 is a medium vulnerability (CVSS 4.3) in Openstack Cinder, published October 21, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.37%, the 31st percentile. Fixed in cinder 2:29.0.0-3.
References
Left out here: 8 versions. The JSON record has them.