CVE-2026-43001
An issue was discovered in OpenStack Keystone 13 through 29. 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.
Ver en NVDAnálisis
OpenStack Keystone versions 13 through 29 contain a flaw that allows cross-project lateral movement. An attacker with an application credential for one project can create EC2 credentials for a different project, effectively breaking tenant isolation. Cloud administrators should patch Keystone immediately to maintain proper authorization boundaries.
Severidad
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:LCWE-863EPSS
Afecta
openstack:keystoneDescripción técnica
An issue was discovered in OpenStack Keystone 13 through 29. 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.