CVE-2026-43001
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:L
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| OpenStack | Keystone | 14.0.0 < 27.0.2 | affected |
| OpenStack | Keystone | 28.0.0 < 28.0.2 | affected |
| OpenStack | Keystone | 29.0.0 < 29.0.2 | affected |
Weaknesses
- CWE-863: CWE-863 Incorrect Authorization
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: no
- Technical Impact: partial
OpenStack Keystone: OpenStack Keystone: Unauthorized cross-project access due to improper validation in EC2 credential creation
Additional References
- 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
References
- https://bugs.launchpad.net/keystone/+bug/2149775
- https://review.opendev.org/c/openstack/keystone/+/985804
- https://security.openstack.org/ossa/OSSA-2026-015.html
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