CVE-2026-43001
- State
- Published
- Severity
- 7.9 High
- Published
- May 1, 2026
- Updated
- Aug 14, 2026
- Reserved
- May 1, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.9 High | CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:L | mitre |
| 3.1 | 8.0 High | CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H | redhat-SADP |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
KeystoneOpenStack |
|
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
- https://access.redhat.com/security/cve/CVE-2026-43001vdb-entry
- RHBZ#2464305issue-tracking
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43001.json
- https://access.redhat.com/errata/RHSA-2026:54757vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:39808vendor-advisory
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