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PatchSiren cyber security CVE debrief

CVE-2026-46448 OpenStack CVE debrief

A vulnerability was discovered in OpenStack Nova before version 33.0.2. The server create API does not properly strip certain hint data, which can lead to an instance being created without a Placement allocation. This issue has a CVSS score of 5.4 and is classified as MEDIUM severity.

Vendor
OpenStack
Product
Nova
CVSS
MEDIUM 5.4
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-16
Original CVE updated
2026-06-26
Advisory published
2026-06-16
Advisory updated
2026-06-26

Who should care

Users of OpenStack Nova, particularly those who manage virtual machines and instances, should be aware of this vulnerability and take steps to mitigate it.

Technical summary

The OpenStack Nova server create API does not strip certain hint data, resulting in an instance with no Placement allocation. This vulnerability is identified as CVE-2026-46448 and has a CVSS score of 5.4.

Defensive priority

MEDIUM

Recommended defensive actions

  • Upgrade to OpenStack Nova version 33.0.2 or later to fix this vulnerability.
  • Review and adjust the server create API to properly strip hint data.

Evidence notes

Evidence for this CVE comes from the National Vulnerability Database (NVD) and the Common Vulnerabilities and Exposures (CVE) list.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-46448 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-46448

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-46448 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-46448

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.