UBUNTU-CVE-2026-40683

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Source
https://ubuntu.com/security/CVE-2026-40683
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-40683.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2026-40683
Upstream
  • CVE-2026-40683
Downstream
Related
Published
2026-04-14T20:16:00Z
Modified
2026-06-17T02:04:10Z
Severity
  • 7.7 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

In OpenStack Keystone before 28.0.1, the LDAP identity backend does not convert the user enabled attribute to a boolean when the user_enabled_invert configuration option is False (the default). The _ldap_res_to_model method in the UserApi class only performed string-to-boolean conversion when user_enabled_invert was True. When False, the raw string value from LDAP (e.g., "FALSE") was used directly. Since non-empty strings are truthy in Python, users marked as disabled in LDAP were treated as enabled by Keystone, allowing them to authenticate and perform actions. All deployments using the LDAP identity backend without user_enabled_invert=True or user_enabled_emulation are affected.

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

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-40683.json"
Ubuntu:18.04:LTS
keystone

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown 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_name": "keystone",
            "binary_version": "2:13.0.4-0ubuntu1"
        },
        {
            "binary_name": "python-keystone",
            "binary_version": "2:13.0.4-0ubuntu1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-40683.json"
Ubuntu:22.04:LTS
keystone

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown 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 

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

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-40683.json"
Ubuntu:24.04:LTS
keystone

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown 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 

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

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-40683.json"
Ubuntu:25.10
keystone

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown 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 

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

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-40683.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
0 Unknown 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_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",
            "binary_version": "2:17.0.1-0ubuntu2+esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-40683.json"