7.4

CVE-2026-40213: openstack cyborg Incorrect Authorization

CVSS: 7.4v3.1HighAwaiting analysis
AliasesGHSA-mm7j-mhhj-hj36PYSEC-2026-2853UBUNTU-CVE-2026-40213
Published 07-05-2026Last modified 08-05-2026
Open JSON

Vulnerability summary

CVE-2026-40213 is a high (CVSS 7.4) Incorrect Authorization 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
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.4/10
010
High · 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

OpenStack Cyborg before 16.0.1 uses rule:allow (check_str='@') as the default policy for multiple API endpoints. This unconditionally authorizes any request carrying a valid Keystone token regardless of roles, project membership, or scope. An authenticated user with zero role assignments can complete various actions such as reprogramming FPGA bitstreams on arbitrary compute nodes via agent RPC.

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≥ 5.0.0, < 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