CVE-2026-46448

Exp

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

Published: 2026-06-16 Last update: 2026-06-26 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2026-46448 is rated Exploit Available (50/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.26%). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2026-46448

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2026-46448

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-17 — 0.26% —

Full EPSS history (1 record total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-46448

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.4 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.
 2.8 2.5 [email protected]
8.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.1 4.7 [email protected]

Weakness enumeration for CVE-2026-46448

GitHub Security Advisory for CVE-2026-46448

GHSA-mfg3-p6m3-gjgr · Severity: medium · Ecosystem: pip — OpenStack Nova: Nova scheduler hint injection bypasses Placement resource claims and scheduling constraints

OS Trackers for CVE-2026-46448

vendor priority summary link
debian not yet assigned CVE-2026-46448 not yet assigned priority: Debian including 1 source packages (nova), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): open 3, resolved 2. https://security-tracker.debian.org/tracker/CVE-2026-46448
ubuntu medium CVE-2026-46448 medium priority: Ubuntu including 1 source packages (nova), 8 status rows across 8 suites (bionic, focal, jammy, noble, questing, resolute, upstream, xenial): released 4, needs-triage 3, needed 1. https://ubuntu.com/security/CVE-2026-46448

Affected software / configurations for CVE-2026-46448

Vendor Product Version Raw CPE
openstack nova >= 18.0.0, < 31.3.1 cpe:2.3:a:openstack:nova:*:*:*:*:*:*:*:*
openstack nova >= 32.0.0, < 32.2.1 cpe:2.3:a:openstack:nova:*:*:*:*:*:*:*:*
openstack nova >= 33.0.0, < 33.0.2 cpe:2.3:a:openstack:nova:*:*:*:*:*:*:*:*

References for CVE-2026-46448

URL Tags
https://bugs.launchpad.net/nova/+bug/2151252 Exploit Issue Tracking Third Party Advisory
https://www.openwall.com/lists/oss-security/2026/06/16/5 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2026/06/16/5 Mailing List Third Party Advisory
cvelogic Threat Intelligence