Vulnerability Details CVE-2026-43001
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.004
EPSS Ranking 32.0%
CVSS Severity
CVSS v3 Score 7.9
References
Products affected by CVE-2026-43001
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cpe:2.3:a:openstack:keystone:14.0.0
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cpe:2.3:a:openstack:keystone:14.0.1
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cpe:2.3:a:openstack:keystone:14.1.0
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cpe:2.3:a:openstack:keystone:15.0.0
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cpe:2.3:a:openstack:keystone:15.0.1
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cpe:2.3:a:openstack:keystone:16.0.0
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cpe:2.3:a:openstack:keystone:16.0.0.0
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cpe:2.3:a:openstack:keystone:16.0.1
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cpe:2.3:a:openstack:keystone:16.0.2
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cpe:2.3:a:openstack:keystone:17.0.0
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cpe:2.3:a:openstack:keystone:17.0.0.0
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cpe:2.3:a:openstack:keystone:17.0.1
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cpe:2.3:a:openstack:keystone:18.0.0
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cpe:2.3:a:openstack:keystone:18.0.0.0
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cpe:2.3:a:openstack:keystone:18.0.1
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cpe:2.3:a:openstack:keystone:19.0.0
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cpe:2.3:a:openstack:keystone:19.0.0.0
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cpe:2.3:a:openstack:keystone:19.0.1
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cpe:2.3:a:openstack:keystone:20.0.0
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cpe:2.3:a:openstack:keystone:20.0.1
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cpe:2.3:a:openstack:keystone:20.0.1-7
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cpe:2.3:a:openstack:keystone:21.0.0
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cpe:2.3:a:openstack:keystone:21.0.1
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cpe:2.3:a:openstack:keystone:21.0.1-6
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cpe:2.3:a:openstack:keystone:22.0.0
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cpe:2.3:a:openstack:keystone:22.0.1
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cpe:2.3:a:openstack:keystone:22.0.2
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cpe:2.3:a:openstack:keystone:23.0.0
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cpe:2.3:a:openstack:keystone:23.0.1
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cpe:2.3:a:openstack:keystone:23.0.2
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cpe:2.3:a:openstack:keystone:24.0.0
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cpe:2.3:a:openstack:keystone:24.1.0
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cpe:2.3:a:openstack:keystone:25.0.0
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cpe:2.3:a:openstack:keystone:26.0.0
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cpe:2.3:a:openstack:keystone:26.1.0
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cpe:2.3:a:openstack:keystone:26.1.1
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cpe:2.3:a:openstack:keystone:27.0.0
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cpe:2.3:a:openstack:keystone:27.0.1
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cpe:2.3:a:openstack:keystone:28.0.0
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cpe:2.3:a:openstack:keystone:28.0.1
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cpe:2.3:a:openstack:keystone:29.0.0
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cpe:2.3:a:openstack:keystone:29.0.1-12