What is CVE-2026-43000?

CVE-2026-43000 is a medium-severity vulnerability in Openstack Keystone, classified under Incorrect Authorization. CVSS score: 6.0/10. Published 2026-05-28.

How severe is CVE-2026-43000?

Medium severity. CVSS v3 base score is 6.0 out of 10.

Auth bypass in Openstack Keystone

CVE-2026-43000

An issue was discovered in OpenStack Keystone before 29.0.2. When combined with an application credential impersonation vulnerability, an attacker with the member role on a project can escalate to admin by chaining unrestricted application…

Vulnerability class: Broken Access Control

EPSS: 0.000 (12.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.0 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:L.

Affected products

Openstack Keystone — versions 14.0.0, 28.0.0, 29.0.0

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

cve@mitre.org (Exploit, Patch, Third Party Advisory, Issue Tracking)
cve@mitre.org (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-43000?: CVE-2026-43000 is a medium-severity vulnerability in Openstack Keystone, classified under Incorrect Authorization. CVSS score: 6.0/10. Published 2026-05-28.
How severe is CVE-2026-43000?: Medium severity. CVSS v3 base score is 6.0 out of 10.