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CVE-2026-43001

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CVE-2026-43001

Published: May 1, 2026

Modified: May 28, 2026

PUBLISHED

CVSS v3.1

7.9

HIGH

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.

VendorProductVersions

OpenStack

Keystone

affected
14.0.0 - < 27.0.2
affected
28.0.0 - < 28.0.2
affected
29.0.0 - < 29.0.2

Weaknesses (CWE)

CWE-863

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:L

Attack Vector

Network

Attack Complexity

High

Privileges Required

High

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

Low

References

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