CVE-2026-43001
Publication date 1 May 2026
Last updated 18 June 2026
Ubuntu priority
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.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| keystone | 26.04 LTS resolute |
Fixed 2:29.0.0-0ubuntu1.2
|
| 25.10 questing |
Fixed 2:28.0.0-0ubuntu1.3
|
|
| 24.04 LTS noble |
Fixed 2:25.0.0-0ubuntu1.4
|
|
| 22.04 LTS jammy |
Fixed 2:21.0.1-0ubuntu2.4
|
|
| 20.04 LTS focal |
Needs evaluation
|
|
| 18.04 LTS bionic |
Needs evaluation
|
|
| 16.04 LTS xenial |
Needs evaluation
|
Severity score breakdown
CVSS version: CVSS v3.0
Base score
7.9 · High
Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:L
References
Related Ubuntu Security Notices (USN)
- USN-8433-1
- OpenStack Keystone vulnerabilities
- 16 June 2026