UBUNTU-CVE-2026-42999

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Source
https://ubuntu.com/security/CVE-2026-42999
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42999.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-42999
Upstream
  • CVE-2026-42999
Downstream
Related
Published
2026-05-28T19:16:00Z
Modified
2026-06-17T02:05:22.849514137Z
Severity
  • 6.0 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:L CVSS Calculator
  • 8.8 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

An issue was discovered in OpenStack Keystone before 29.0.2. The Keystone RBAC policy enforcer in enforcecall unconditionally merges the raw JSON request body into the policy enforcement dictionary via policydict.update(jsoninput.copy()), overwriting trusted target data that was previously set from database lookups. Because flask.request.getjson is called with force=True, this works regardless of Content-Type or HTTP method. Any authenticated user can inject arbitrary policy target attributes (e.g., userid, projectid) into the request body to bypass RBAC checks and perform unauthorized operations on resources belonging to other users or projects. This was introduced in commit 5ea59f52 (Rocky/14.0.0).

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-2026-42999.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-2026-42999.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-2026-42999.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-2026-42999.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-2026-42999.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-2026-42999.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-2026-42999.json"