CVE-2026-43001
Last modified
CVE-2026-43001 is a high-severity vulnerability rated 8/10 on the CVSS scale. 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. EPSS estimates a 0.40% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Openstack | Keystone | >= 14.0.0, < 27.0.2 |
| Openstack | Keystone | >= 28.0.0, < 28.0.2 |
| Openstack | Keystone | >= 29.0.0, < 29.0.2 |
References
- https://bugs.launchpad.net/keystone/+bug/2149775Exploit, Issue Tracking, Patch, Third Party Advisory
- https://security.openstack.org/ossa/OSSA-2026-015.htmlPatch, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
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