CVE-2026-43001 : faille élevée openstack keystone (CVSS 8.0)

An issue was discovered in OpenStack Keystone before 29.0.2. POST /v3/credentials did not validate that the caller-supplied project_id for an EC2-type credential matched the project of the authenticating application credential. This allowed an attacker holding an unrestricted application credential for project A to create an EC2 credential targeting project B; a subsequent /v3/ec2tokens exchange would then issue a Keystone token scoped to project B while still carrying the original app_cred_id, enabling cross-project lateral movement within the credential owner's role footprint.

Sévérité

Élevée (CVSS 8.0)

Vecteur CVSS

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

Exploitation active

Non signalée par la CISA

Publication

1 mai 2026

Dernière mise à jour

14 août 2026

• openstack keystone

• Fiche CVE-2026-43001 sur le NVD (NIST)
• bugs.launchpad.net/keystone/+bug/2149775
• review.opendev.org/c/openstack/keystone/+/985804
• security.openstack.org/ossa/OSSA-2026-015.html
• access.redhat.com/errata/RHSA-2026:39808
• access.redhat.com/errata/RHSA-2026:54757
• access.redhat.com/security/cve/CVE-2026-43001
• bugzilla.redhat.com/show_bug.cgi
• security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43001.json