RHSA-2026:39808 - Security Advisory

Topic

An update for openstack-keystone is now available for Red Hat OpenStack
Services on OpenShift 18.0 (Antelope).

Red Hat Product Security has rated this update as having a security impact
of Important. A Common Vulnerability Scoring System (CVSS) base score,
which gives a detailed severity rating, is available for each vulnerability
from the CVE link(s) in the References section.

Description

Keystone is a Python implementation of the OpenStack
(http://www.openstack.org) identity service API.

Security Fix(es):

• Keystone: OpenStack Keystone: Unauthorized cross-project access due to

improper validation in EC2 credential creation (CVE-2026-43001)

• Keystone: OpenStack Keystone: Unauthorized access due to incorrect LDAP

user status handling (CVE-2026-40683)

• OpenStack Keystone: Privilege escalation through EC2 credential creation

(CVE-2026-33551)

For more details about the security issue(s), including the impact, a CVSS
score, acknowledgments, and other related information, refer to the CVE
page listed in the References section.

Solution

For details on how to apply this update, which includes the changes
described in this advisory, refer to:

https://access.redhat.com/articles/11258

Affected Products

• Red Hat OpenStack Services on OpenShift 18.0 x86_64

Fixes

• BZ - 2451037 - CVE-2026-33551 openstack-keystone: OpenStack Keystone: Privilege escalation through EC2 credential creation
• BZ - 2458472 - CVE-2026-40683 OpenStack Keystone: OpenStack Keystone: Unauthorized access due to incorrect LDAP user status handling
• BZ - 2464305 - CVE-2026-43001 OpenStack Keystone: OpenStack Keystone: Unauthorized cross-project access due to improper validation in EC2 credential creation

CVEs

• CVE-2026-33551
• CVE-2026-40683
• CVE-2026-43001

References

• https://access.redhat.com/security/updates/classification/#important