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CVE-2026-93856

Vulnerability in OpenStack Cinder

CVSS score

4.3

EPSS probability

—

Risk score

0.4

Published

3 h ago

OverviewPublic Exploits (0)NewsroomVulnerability Timeline
Patch status has not yet been verified

Resmî kaynaklarda yeterli kanıt bulunamadı. Bu sonuç “yama yok” anlamına gelmez.

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Vulnerability description

DayBreach AI Explanation

Verified against sources

OpenStack Cinder Messages API Information Disclosure (CVE-2026-93856)

Sources read

1

Source agreement

Tam uyum

Evidence confidence

%55

Short explanation

In OpenStack Cinder through 29.0.0, a user with the project‑scoped 'member' or 'reader' role can call List messages on the Messages API and receive non‑expired messages and resource UUIDs belonging to other projects (S0, S1).

Why does it matter?

Leakage of confidential resource identifiers across projects threatens data confidentiality and integrity.

What should be done?

  • Follow the OpenStack security advisory (S0)
  • Patch status is unknown; plan updates according to vendor guidance
  • Review and tighten API role assignments
  • Enable logging and alerts for unauthorized API calls
Chain of evidence and sources2 verified claims

Bu CVE, Cinder Messages API'sinde proje dışı mesaj ve UUID sızdırmasına yol açan bir bilgi sızdırma açığıdır (S0, S1).

S0 · daybreach-canonicalS1 · cvelist

CVE, CISA KEV listesinde yer almıyor ve yama durumu belirsizdir; aktif istismar kanıtı bulunmamaktadır (S0).

S0 · daybreach-canonical
Show the technical text from the sources

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.

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

CWE: CWE-669

This explanation was compiled automatically from the source records. Scores, active exploitation, patch and exploit status come straight from the sources.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-93856 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

IDVENDORPRODUCTACTION
1openstackCinder View
Total affected vendors: 1|Products: 1

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCOREVERSIONSEVERITYVECTORSOURCE
4.3CVSS V31MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:NNVD
4.3CVSS V3_1MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:NCVE CNA

Patch and Remediation Guide

Solution & Remediation Advisory

Patch status unknown

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Confirm the affected product and version against the source evidence above.
Restrict access to internet-facing services and apply network segmentation.
Until a patch is confirmed, follow the vendor advisory; do not read an unknown status as “no patch”.
Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-93856 is associated with the following CWEs:

CWE-669: Common Weakness Enumeration Entry CWE-669

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-93856 weaknesses.

CAPEC-66: SQL InjectionCAPEC-126: Path TraversalCAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureAğ üzerinden
PermissionsLow
UserGerekmiyor

Official Sources and Advisories

https://bugs.launchpad.net/cinder/+bug/2160671vendor-advisoryhttps://security.openstack.org/ossa/OSSA-2026-045.htmlvendor-advisoryhttps://www.openwall.com/lists/oss-security/2026/10/20/17vendor-advisoryhttp://www.openwall.com/lists/oss-security/2026/10/20/17nvd

CVSS Vector Radar Chart

4.3 / 10
Attack VectorNetworkComplexityLowPrivilegesLowUser Interact.NoneConfidentialityLowIntegrityNoneAvailabilityNone

Vulnerability Scoring Details

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredLow privileges
User InteractionNone required
Confidentiality (Gizlilik)Low
Integrity (Bütünlük)None
Availability (Erişilebilirlik)None

Yama durumu bilinmiyor

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Follow the vendor

O
openstack logo
openstack

Weakness Type (CWE & CAPEC)

CWE-669

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CVE-2026-93856 · Vulnerability in OpenStack Cinder · DayBreach