CVE-2026-46448

HIGHNVD 8.58.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.5 under NVD CVSS v3. EPSS exploit probability: 0.3%, top 81% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Elevated
8.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 8.5Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

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

CVSS v3
8.5
EG Score
8.5HIGHmedium confidence
EG Risk
54
EG Risk 54/100

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity85% × 45%
Exploitation40% × 40%
Automatability0% × 15%
EPSS PROB
0.5%
EPSS %ILE
37th
KEV
Not listed

Published

June 16, 2026

Last Modified

June 26, 2026

Advisory Details (3)

Auto-updated Jun 16, 2026
Patch available.
generic

oss-security - [OSSA-2026-022] OpenStack Nova: Nova scheduler hint injection bypasses Placement resource claims and scheduling constraints (CVE-2026-46448)

http://www.openwall.com/lists/oss-security/2026/06/16/5
generic

oss-security - [OSSA-2026-022] OpenStack Nova: Nova scheduler hint injection bypasses Placement resource claims and scheduling constraints (CVE-2026-46448)

https://www.openwall.com/lists/oss-security/2026/06/16/5
generic

Bug #2151252 “[OSSA-2026-022] Nova scheduler hint injection bypa...” : Bugs : OpenStack Compute (nova)

https://bugs.launchpad.net/nova/+bug/2151252

Vendor Advisories for CVE-2026-46448(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(5 across 5 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
nova2:22.0.1-2 ... 2:33.0.1-5 (103 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
nova2:26.1.0-4 ... 2:34.0.0~rc1-3 (69 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
nova2:31.0.0-6 ... 2:34.0.0~rc1-3 (32 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
nova2:31.0.0-6 ... 2:33.0.1-2 (24 versions)
  • every version up to 2:33.0.1-4: fixed in 2:33.0.1-4
—
PyPI(1)
PackageVulnerable rangeFix by version rangeDependents
nova18.0.2 ... 33.0.1 (127 versions)
  • 18.0.0 through 31.3.0: no fix on record
  • 32.0.0 up to 32.2.1: fixed in 32.2.1
  • 33.0.0 up to 33.0.2: fixed in 33.0.2
  • 18.0.0 up to 31.3.1: fixed in 31.3.1
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 7× in last 7d / 26× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 141 total refreshes for this CVE.

  1. 2026-10-09 20:07 UTCEPSS rescore
  2. 2026-10-08 17:12 UTCEPSS rescore
  3. 2026-10-07 23:48 UTCEPSS rescore
  4. 2026-10-06 15:18 UTCEPSS rescore
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  7. 2026-10-03 14:25 UTCEPSS rescore
  8. 2026-10-03 07:09 UTCOSV refresh
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  21. 2026-09-14 03:28 UTCEG score recompute
  22. 2026-09-13 16:47 UTCEPSS rescore
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  24. 2026-09-11 14:53 UTCEPSS rescore
  25. 2026-09-11 09:37 UTCEPSS rescore
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  1. 2026-09-10 09:34 UTCEPSS rescore
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  5. 2026-09-02 14:12 UTCEPSS rescore
  6. 2026-09-01 13:54 UTCEPSS rescore
  7. 2026-08-30 22:43 UTCEG score recompute
  8. 2026-08-30 19:17 UTCEPSS rescore
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  10. 2026-08-28 21:41 UTCEPSS rescore
  11. 2026-08-27 14:25 UTCEPSS rescore
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  14. 2026-08-24 23:22 UTCEG score recompute
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  18. 2026-08-21 23:49 UTCEPSS rescore
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  20. 2026-08-20 22:55 UTCEPSS rescore
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  22. 2026-08-19 17:04 UTCEPSS rescore
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  24. 2026-08-18 13:48 UTCEPSS rescore
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  26. 2026-08-16 21:57 UTCEG score recompute
  27. 2026-08-16 14:56 UTCEPSS rescore
  28. 2026-08-16 06:22 UTCEG score recompute
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  34. 2026-08-12 23:39 UTCEG score recompute
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  36. 2026-08-11 21:30 UTCEG score recompute
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  39. 2026-08-09 14:45 UTCEG score recompute
  40. 2026-08-09 13:46 UTCEPSS rescore
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  42. 2026-08-08 16:37 UTCEPSS rescore
  43. 2026-08-07 23:32 UTCEG score recompute
  44. 2026-08-06 21:23 UTCEG score recompute
  45. 2026-08-06 13:47 UTCEPSS rescore
  46. 2026-08-06 08:18 UTCEG score recompute
  47. 2026-08-05 19:17 UTCEPSS rescore
  48. 2026-08-04 16:50 UTCEG score recompute
  49. 2026-08-04 15:10 UTCEPSS rescore
  50. 2026-08-04 10:39 UTCEPSS rescore
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  62. 2026-07-27 14:13 UTCEPSS rescore
  63. 2026-07-26 19:45 UTCEG score recompute
  64. 2026-07-26 14:54 UTCEPSS rescore
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  67. 2026-07-24 14:17 UTCEPSS rescore
  68. 2026-07-23 14:18 UTCEPSS rescore
  69. 2026-07-23 03:17 UTCEG score recompute
  70. 2026-07-22 14:08 UTCEPSS rescore
  71. 2026-07-21 15:24 UTCEPSS rescore
  72. 2026-07-20 17:08 UTCEPSS rescore
  73. 2026-07-19 14:31 UTCEPSS rescore
  74. 2026-07-19 02:29 UTCEPSS rescore
  75. 2026-07-18 10:04 UTCEPSS rescore

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-46448?
CVE-2026-46448 is a high vulnerability published on June 16, 2026. In OpenStack Nova before 33.0.2, the server create API does not strip certain hint data. The resulting instance has no Placement allocation.
When was CVE-2026-46448 disclosed?
CVE-2026-46448 was first published on June 16, 2026, with the most recent update on June 26, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-46448 actively exploited?
CVE-2026-46448 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (37th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-46448?
CVE-2026-46448 has a CVSS v3 base score of 8.5 (NVD).
How do I remediate CVE-2026-46448?
A fix for CVE-2026-46448 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-46448 are linked in the Vendor Advisories panel on this page.

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