Red Hat OpenStack Keystone: Schwachstelle ermöglicht Privilegieneskalation
WID-SEC-2026-1116 · first 15.04.2026 · updated 15.07.2026 · CVSS 7,7
What it is about
Red Hat OpenStack ist eine Sammlung von Diensten, um Cloud-Computing in Form von Infrastructure as a Service (IaaS) bereitstellen zu können. Ein entfernter, authentisierter Angreifer kann eine Schwachstelle in Red Hat OpenStack Keystone ausnutzen, um die Authentifizierung zu umgehen und sich unbefugten Zugriff auf das System zu verschaffen.
Under what conditions?
Over the network, but only with valid access (login required), for example with stolen credentials or as an insider.
What can happen in the worst case
An attacker could use the vulnerability to
- die Authentifizierung zu umgehen
- sich unbefugten Zugriff auf das System zu verschaffen
Am I affected?
Affected according to the BSI:
- Debian Linux
- Ubuntu Linux
- Red Hat OpenStack Keystone <28.0.1
- Red Hat OpenShift OpenStack Services
The installed version is usually shown under “Help → About” or in the device’s admin interface.
What helps?
Update to at least:
- Red Hat OpenStack Keystone 28.0.1
Is the vulnerability already being exploited?
None of the CVEs is in the CISA catalogue of exploited vulnerabilities. That does not mean there are no attacks, only that none are documented.
Information and sources
- Original BSI advisory (WID)
- GitHub Security Advisory GHSA-pfx2-9x9m-7ghx vom 2026-04-14 github.com
- EU Vulnerability Database vom 2026-04-14 euvd.enisa.europa.eu
- Debian Security Advisory DLA-4611 vom 2026-06-01 lists.debian.org
- Ubuntu Security Notice USN-8433-1 vom 2026-06-16 ubuntu.com
- Red Hat Security Advisory RHSA-2026:39808 vom 2026-07-15 access.redhat.com
CVE: CVE-2026-40683
Source: BSI warning and information service (CERT-Bund); CISA. The assessment of the conditions is my reading of the BSI text; the external pages are in their original language.