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.

CVSS v3 7.9 HIGH

7.9^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.3 / Impact : 6.0

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact LOW

Scope CHANGED

References

Link	Resource
https://bugs.launchpad.net/keystone/+bug/2149775	Exploit Issue Tracking Patch Third Party Advisory
https://review.opendev.org/c/openstack/keystone/+/985804	Patch
https://security.openstack.org/ossa/OSSA-2026-015.html	Patch Vendor 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

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:openstack:keystone::::::::
	cpe:2.3:a:openstack:keystone::::::::
	cpe:2.3:a:openstack:keystone::::::::

History

No history.

Information

Published : 2026-05-01 09:16

Updated : 2026-08-14 13:18

NVD link : CVE-2026-43001

Mitre link : CVE-2026-43001

CVE.ORG link : CVE-2026-43001

JSON object : View

Products Affected

openstack

keystone

CWE

CWE-863

Incorrect Authorization

CWE-1288

Improper Validation of Consistency within Input

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