6.3

CVE-2026-40214: openstack cyborg Improper Ownership Management

CVSS: 6.3v3.1MediumAwaiting analysis
AliasesGHSA-mmpc-xjxr-5hf8PYSEC-2026-2854UBUNTU-CVE-2026-40214
Published 07-05-2026Last modified 08-05-2026
Open JSON

Vulnerability summary

CVE-2026-40214 is a medium (CVSS 6.3) Improper Ownership Management vulnerability in openstack cyborg. EPSS estimates a 0.33% chance of exploitation in the next 30 days, higher than 24.9% of scored vulnerabilities.

Overall risk
25/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.3/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.33%
0%100%
Low · +0.13 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1 · Related 1
USN-8413-1

Timeline

  1. 07-05-2026
    PublishedVulnerability first disclosed.
  2. 08-05-2026
    Last modifiedVulnerability information updated.

Description

In OpenStack Cyborg before 16.0.1, the Accelerator Request (ARQ) API does not enforce project ownership at any layer. The project_id column in the database is never populated (NULL for every ARQ), database queries have no project filtering, and policy checks are self-referential (the authorize_wsgi decorator compares the caller's project_id with itself rather than the target resource). Any authenticated non-admin user can complete various actions such as deleting ARQs bound to other projects' instances, aka cross-tenant denial of service.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.33%

Chance of exploitation in the next 30 days

Percentile

25%

Versus all other CVEs

30-day change

+0.13 pp

From 0.21% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.33%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Debian1 product
  • cyborg< 14.0.0-3+deb13u1 | < 16.0.0+git+2026.04.26.b8edfa06f1-1
Openstack1 product
  • cyborg≥ 3.0.0, < 14.0.1 | ≥ 15.0.0, < 15.0.1 | ≥ 16.0.0, < 16.0.1
PyPI1 product
  • openstack-cyborg< 16.0.1
Ubuntu1 product
  • cyborg< 14.0.0-3+deb13u1build0.25.10.1 | < 16.0.0-2ubuntu0.1

4 vendors · 4 products

References

11 links
Show all 11 references