UBUNTU-CVE-2026-43001

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Source
https://ubuntu.com/security/CVE-2026-43001
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-43001.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2026-43001
Upstream
Downstream
Related
Published
2026-05-01T09:16:00Z
Modified
2026-06-30T18:16:52.935427213Z
Severity
  • 7.9 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:L CVSS Calculator
  • 8.0 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H CVSS Calculator
  • 8.0 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

An issue was discovered in OpenStack Keystone before 29.0.2. POST /v3/credentials did not validate that the caller-supplied projectid 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 appcred_id, enabling cross-project lateral movement within the credential owner's role footprint.

References

Affected packages

Ubuntu:16.04:LTS
keystone

Package

Name
keystone
Purl
pkg:deb/ubuntu/keystone?arch=source&distro=xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

2:8.*
2:8.0.0-0ubuntu1
2:9.*
2:9.0.0~b1-0ubuntu1
2:9.0.0~b2-0ubuntu1
2:9.0.0~b3-0ubuntu1
2:9.0.0~rc1-0ubuntu1
2:9.0.0-0ubuntu1
2:9.0.2-0ubuntu1
2:9.0.2-0ubuntu2
2:9.1.0-0ubuntu1
2:9.2.0-0ubuntu1
2:9.3.0-0ubuntu1
2:9.3.0-0ubuntu2
2:9.3.0-0ubuntu3
2:9.3.0-0ubuntu3.1
2:9.3.0-0ubuntu3.2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2:9.3.0-0ubuntu3.2",
            "binary_name": "keystone"
        },
        {
            "binary_version": "2:9.3.0-0ubuntu3.2",
            "binary_name": "python-keystone"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-43001.json"
Ubuntu:18.04:LTS
keystone

Package

Name
keystone
Purl
pkg:deb/ubuntu/keystone?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

2:12.*
2:12.0.0-0ubuntu1
2:13.*
2:13.0.0~b1-0ubuntu1
2:13.0.0~b2-0ubuntu1
2:13.0.0~b3-0ubuntu1
2:13.0.0~rc1-0ubuntu1
2:13.0.0~rc2-0ubuntu1
2:13.0.0-0ubuntu1
2:13.0.1-0ubuntu1
2:13.0.2-0ubuntu1
2:13.0.2-0ubuntu3
2:13.0.4-0ubuntu1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2:13.0.4-0ubuntu1",
            "binary_name": "keystone"
        },
        {
            "binary_version": "2:13.0.4-0ubuntu1",
            "binary_name": "python-keystone"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-43001.json"
Ubuntu:22.04:LTS
keystone

Package

Name
keystone
Purl
pkg:deb/ubuntu/keystone?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2:21.0.1-0ubuntu2.4

Affected versions

2:20.*
2:20.0.0-0ubuntu1
2:20.0.0+git2021120815.2ddf8f321-0ubuntu1
2:20.0.0+git2022011217.771c943ad-0ubuntu1
2:20.0.0+git2022030313.a3fc9e7c3-0ubuntu1
2:21.*
2:21.0.0-0ubuntu1
2:21.0.1-0ubuntu1
2:21.0.1-0ubuntu2
2:21.0.1-0ubuntu2.1
2:21.0.1-0ubuntu2.2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2:21.0.1-0ubuntu2.4",
            "binary_name": "keystone"
        },
        {
            "binary_version": "2:21.0.1-0ubuntu2.4",
            "binary_name": "keystone-common"
        },
        {
            "binary_version": "2:21.0.1-0ubuntu2.4",
            "binary_name": "python3-keystone"
        }
    ],
    "availability": "No subscription required"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-43001.json"
Ubuntu:24.04:LTS
keystone

Package

Name
keystone
Purl
pkg:deb/ubuntu/keystone?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2:25.0.0-0ubuntu1.4

Affected versions

2:24.*
2:24.0.0-0ubuntu1
2:24.0.0+git2024011916.adfa92b4-0ubuntu1
2:25.*
2:25.0.0~rc1-0ubuntu1
2:25.0.0-0ubuntu1
2:25.0.0-0ubuntu1.1
2:25.0.0-0ubuntu1.2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2:25.0.0-0ubuntu1.4",
            "binary_name": "keystone"
        },
        {
            "binary_version": "2:25.0.0-0ubuntu1.4",
            "binary_name": "keystone-common"
        },
        {
            "binary_version": "2:25.0.0-0ubuntu1.4",
            "binary_name": "python3-keystone"
        }
    ],
    "availability": "No subscription required"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-43001.json"
Ubuntu:25.10
keystone

Package

Name
keystone
Purl
pkg:deb/ubuntu/keystone?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2:28.0.0-0ubuntu1.3

Affected versions

2:27.*
2:27.0.0-0ubuntu1
2:27.0.0+git2025080113.e066e18ab-0ubuntu1
2:28.*
2:28.0.0~rc1-0ubuntu1
2:28.0.0-0ubuntu1
2:28.0.0-0ubuntu1.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2:28.0.0-0ubuntu1.3",
            "binary_name": "keystone"
        },
        {
            "binary_version": "2:28.0.0-0ubuntu1.3",
            "binary_name": "keystone-common"
        },
        {
            "binary_version": "2:28.0.0-0ubuntu1.3",
            "binary_name": "python3-keystone"
        }
    ],
    "availability": "No subscription required"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-43001.json"
Ubuntu:26.04:LTS
keystone

Package

Name
keystone
Purl
pkg:deb/ubuntu/keystone?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2:29.0.0-0ubuntu1.2

Affected versions

2:28.*
2:28.0.0-0ubuntu1
2:28.0.0-0ubuntu2
2:28.0.0+git20260119.61.8a42793e7-0ubuntu1
2:29.*
2:29.0.0~rc1-0ubuntu1
2:29.0.0-0ubuntu1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2:29.0.0-0ubuntu1.2",
            "binary_name": "keystone"
        },
        {
            "binary_version": "2:29.0.0-0ubuntu1.2",
            "binary_name": "keystone-common"
        },
        {
            "binary_version": "2:29.0.0-0ubuntu1.2",
            "binary_name": "python3-keystone"
        }
    ],
    "availability": "No subscription required"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-43001.json"
Ubuntu:Pro:20.04:LTS
keystone

Package

Name
keystone
Purl
pkg:deb/ubuntu/keystone?arch=source&distro=esm-infra%2Ffocal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

2:16.*
2:16.0.0-0ubuntu1
2:17.*
2:17.0.0~b1~git2019121613.db81fee63-0ubuntu1
2:17.0.0~b2~git2020020513.99733f172-0ubuntu1
2:17.0.0~b3~git2020032415.9f9040257-0ubuntu1
2:17.0.0~b3~git2020032415.9f9040257-0ubuntu2
2:17.0.0~b3~git2020041013.7bb6314e4-0ubuntu1
2:17.0.0-0ubuntu0.20.04.1
2:17.0.1-0ubuntu1
2:17.0.1-0ubuntu2
2:17.0.1-0ubuntu2+esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2:17.0.1-0ubuntu2+esm1",
            "binary_name": "keystone"
        },
        {
            "binary_version": "2:17.0.1-0ubuntu2+esm1",
            "binary_name": "keystone-common"
        },
        {
            "binary_version": "2:17.0.1-0ubuntu2+esm1",
            "binary_name": "python3-keystone"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-43001.json"