In OpenStack Nova before 33.0.2, the server create API does not strip certain hint data. The resulting instance has no Placement allocation.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - In OpenStack Nova before 33.0.2, the server create API does not strip certain hint data. The resulting
    instance has no Placement allocation. (CVE-2026-46448)

The remote Ubuntu 22.04 LTS / 24.04 LTS / 25.10 / 26.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-8434-1 advisory.

    It was discovered that Nova did not strip internal _nova-prefixed scheduler hints supplied by users on     instance creation. An attacker could possibly use this issue to bypass Placement resource claims and     scheduling constraint enforcement.

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - In OpenStack Nova before 33.0.2, the server create API does not strip certain hint data. The resulting     instance has no Placement allocation. (CVE-2026-46448)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Severity
443372	SCA: security update for nova (GHSA-mfg3-p6m3-gjgr)	Tenable Cloud Security	SCA Checks	high
443372	SCA: security update for nova (GHSA-mfg3-p6m3-gjgr)	Tenable Self-Hosted Container Security	SCA Checks	high
321372	Ubuntu 22.04 LTS / 24.04 LTS / 25.10 / 26.04 LTS : Nova vulnerability (USN-8434-1)	Nessus	Ubuntu Local Security Checks	high
321286	Linux Distros Unpatched Vulnerability : CVE-2026-46448	Nessus	Misc.	high

Detections

Analytics

CVE-2026-46448

high

Tenable Plugins

high

high

high

high