Vulnerability Description
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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Openstack | Keystone | >= 13.0.0, <= 19.0.0 |
Related Weaknesses (CWE)
References
- https://bugs.launchpad.net/keystone/+bug/2149775ExploitIssue Tracking
- https://review.opendev.org/c/openstack/keystone/+/985804Patch
FAQ
What is CVE-2026-43001?
CVE-2026-43001 is a vulnerability with a CVSS score of 7.9 (HIGH). 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 authenticat...
How severe is CVE-2026-43001?
CVE-2026-43001 has been rated HIGH with a CVSS base score of 7.9/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-43001?
Check the references section above for vendor advisories and patch information. Affected products include: Openstack Keystone.