What is CVE-2026-42998?

CVE-2026-42998 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-2026-42998?

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

Auth bypass in Openstack Keystone

CVE-2026-42998

An issue was discovered in OpenStack Keystone before 29.0.2. The Keystone application credential authentication plugin does not verify that the user supplied in the authentication request matches the owner of the application credential. An…

Vulnerability class: Broken Access Control

EPSS: 0.001 (20.0th 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-2026-42998?: CVE-2026-42998 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-2026-42998?: Medium severity. CVSS v3 base score is 6.0 out of 10.