Vulnerability Description
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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Openstack | Keystone | >= 14.0.0, < 27.0.2 |
Related Weaknesses (CWE)
References
- https://bugs.launchpad.net/keystone/+bug/2149775ExploitIssue TrackingPatch
- https://review.opendev.org/c/openstack/keystone/+/985804Patch
- https://security.openstack.org/ossa/OSSA-2026-015.htmlPatchVendor Advisory
- https://access.redhat.com/errata/RHSA-2026:39808
- https://access.redhat.com/errata/RHSA-2026:54757
- https://access.redhat.com/security/cve/CVE-2026-43001
- https://bugzilla.redhat.com/show_bug.cgi?id=2464305
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43001.json
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 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 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.