UnratedFix available

UBUNTU-CVE-2026-40683

Type: advisorySource: OSV1 source record

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.

Announced 14 Apr 2026Source revision 1

Original source ↗

UBUNTU-CVE-2026-40683

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:UBUNTU-CVE-2026-40683

keystone

Source reference: /affected/0/package/name

Affected versions: 2:8.0.0-0ubuntu1
Source reference: /affected/0/versions
2:9.0.0~b1-0ubuntu1
Source reference: /affected/0/versions
2:9.0.0~b2-0ubuntu1
Source reference: /affected/0/versions
2:9.0.0~b3-0ubuntu1
Source reference: /affected/0/versions
2:9.0.0~rc1-0ubuntu1
Source reference: /affected/0/versions
2:9.0.0-0ubuntu1
Source reference: /affected/0/versions
2:9.0.2-0ubuntu1
Source reference: /affected/0/versions
2:9.0.2-0ubuntu2
Source reference: /affected/0/versions
2:9.1.0-0ubuntu1
Source reference: /affected/0/versions
2:9.2.0-0ubuntu1
Source reference: /affected/0/versions
2:9.3.0-0ubuntu1
Source reference: /affected/0/versions
2:9.3.0-0ubuntu2
Source reference: /affected/0/versions
2:9.3.0-0ubuntu3
Source reference: /affected/0/versions
2:9.3.0-0ubuntu3.1
Source reference: /affected/0/versions
2:9.3.0-0ubuntu3.2
Source reference: /affected/0/versions
2:9.3.0-0ubuntu3.2+esm2
Source reference: /affected/0/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

keystone

Source reference: /affected/1/package/name

Affected versions: 2:12.0.0-0ubuntu1
Source reference: /affected/1/versions
2:13.0.0~b1-0ubuntu1
Source reference: /affected/1/versions
2:13.0.0~b2-0ubuntu1
Source reference: /affected/1/versions
2:13.0.0~b3-0ubuntu1
Source reference: /affected/1/versions
2:13.0.0~rc1-0ubuntu1
Source reference: /affected/1/versions
2:13.0.0~rc2-0ubuntu1
Source reference: /affected/1/versions
2:13.0.0-0ubuntu1
Source reference: /affected/1/versions
2:13.0.1-0ubuntu1
Source reference: /affected/1/versions
2:13.0.2-0ubuntu1
Source reference: /affected/1/versions
2:13.0.2-0ubuntu3
Source reference: /affected/1/versions
2:13.0.4-0ubuntu1
Source reference: /affected/1/versions
2:13.0.4-0ubuntu1+esm1
Source reference: /affected/1/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

keystone

Source reference: /affected/2/package/name

Affected versions: 2:16.0.0-0ubuntu1
Source reference: /affected/2/versions
2:17.0.0~b1~git2019121613.db81fee63-0ubuntu1
Source reference: /affected/2/versions
2:17.0.0~b2~git2020020513.99733f172-0ubuntu1
Source reference: /affected/2/versions
2:17.0.0~b3~git2020032415.9f9040257-0ubuntu1
Source reference: /affected/2/versions
2:17.0.0~b3~git2020032415.9f9040257-0ubuntu2
Source reference: /affected/2/versions
2:17.0.0~b3~git2020041013.7bb6314e4-0ubuntu1
Source reference: /affected/2/versions
2:17.0.0-0ubuntu0.20.04.1
Source reference: /affected/2/versions
2:17.0.1-0ubuntu1
Source reference: /affected/2/versions
2:17.0.1-0ubuntu2
Source reference: /affected/2/versions
2:17.0.1-0ubuntu2+esm1
Source reference: /affected/2/versions
2:17.0.1-0ubuntu2+esm2
Source reference: /affected/2/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

keystone

Source reference: /affected/3/package/name

Affected versions: 2:20.0.0-0ubuntu1
Source reference: /affected/3/versions
2:20.0.0+git2021120815.2ddf8f321-0ubuntu1
Source reference: /affected/3/versions
2:20.0.0+git2022011217.771c943ad-0ubuntu1
Source reference: /affected/3/versions
2:20.0.0+git2022030313.a3fc9e7c3-0ubuntu1
Source reference: /affected/3/versions
2:21.0.0-0ubuntu1
Source reference: /affected/3/versions
2:21.0.1-0ubuntu1
Source reference: /affected/3/versions
2:21.0.1-0ubuntu2
Source reference: /affected/3/versions
2:21.0.1-0ubuntu2.1
Source reference: /affected/3/versions
2:21.0.1-0ubuntu2.2
Source reference: /affected/3/versions
Fixed versions: 2:21.0.1-0ubuntu2.4
Source reference: /affected/3/ranges
Prerequisites: Not stated in this record

keystone

Source reference: /affected/4/package/name

Affected versions: 2:24.0.0-0ubuntu1
Source reference: /affected/4/versions
2:24.0.0+git2024011916.adfa92b4-0ubuntu1
Source reference: /affected/4/versions
2:25.0.0~rc1-0ubuntu1
Source reference: /affected/4/versions
2:25.0.0-0ubuntu1
Source reference: /affected/4/versions
2:25.0.0-0ubuntu1.1
Source reference: /affected/4/versions
2:25.0.0-0ubuntu1.2
Source reference: /affected/4/versions
Fixed versions: 2:25.0.0-0ubuntu1.4
Source reference: /affected/4/ranges
Prerequisites: Not stated in this record

keystone

Source reference: /affected/5/package/name

Affected versions: 2:27.0.0-0ubuntu1
Source reference: /affected/5/versions
2:27.0.0+git2025080113.e066e18ab-0ubuntu1
Source reference: /affected/5/versions
2:28.0.0~rc1-0ubuntu1
Source reference: /affected/5/versions
2:28.0.0-0ubuntu1
Source reference: /affected/5/versions
2:28.0.0-0ubuntu1.1
Source reference: /affected/5/versions
Fixed versions: 2:28.0.0-0ubuntu1.3
Source reference: /affected/5/ranges
Prerequisites: Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "keystone",
      "purl": "pkg:deb/ubuntu/keystone?arch=source&distro=esm-infra-legacy%2Fxenial",
      "ecosystem": "Ubuntu:Pro:16.04:LTS"
    },
    "versions": [
      "2:8.0.0-0ubuntu1",
      "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",
      "2:9.3.0-0ubuntu3.2+esm2"
    ],
    "database_specific": {
      "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-40683.json"
    },
    "ecosystem_specific": {
      "binaries": [
        {
          "binary_name": "keystone",
          "binary_version": "2:9.3.0-0ubuntu3.2+esm2"
        },
        {
          "binary_name": "python-keystone",
          "binary_version": "2:9.3.0-0ubuntu3.2+esm2"
        }
      ]
    }
  },
  {
    "ranges": [
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        "type": "ECOSYSTEM",
        "events": [
          {
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          }
        ]
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    ],
    "package": {
      "name": "keystone",
      "purl": "pkg:deb/ubuntu/keystone?arch=source&distro=esm-infra%2Fbionic",
      "ecosystem": "Ubuntu:Pro:18.04:LTS"
    },
    "versions": [
      "2:12.0.0-0ubuntu1",
      "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",
      "2:13.0.4-0ubuntu1+esm1"
    ],
    "database_specific": {
      "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-40683.json"
    },
    "ecosystem_specific": {
      "binaries": [
        {
          "binary_name": "keystone",
          "binary_version": "2:13.0.4-0ubuntu1+esm1"
        },
        {
          "binary_name": "python-keystone",
          "binary_version": "2:13.0.4-0ubuntu1+esm1"
        }
      ]
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
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    ],
    "package": {
      "name": "keystone",
      "purl": "pkg:deb/ubuntu/keystone?arch=source&distro=esm-infra%2Ffocal",
      "ecosystem": "Ubuntu:Pro:20.04:LTS"
    },
    "versions": [
      "2:16.0.0-0ubuntu1",
      "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",
      "2:17.0.1-0ubuntu2+esm2"
    ],
    "database_specific": {
      "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-40683.json"
    },
    "ecosystem_specific": {
      "binaries": [
        {
          "binary_name": "keystone",
          "binary_version": "2:17.0.1-0ubuntu2+esm2"
        },
        {
          "binary_name": "keystone-common",
          "binary_version": "2:17.0.1-0ubuntu2+esm2"
        },
        {
          "binary_name": "python3-keystone",
          "binary_version": "2:17.0.1-0ubuntu2+esm2"
        }
      ]
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "2:21.0.1-0ubuntu2.4"
          }
        ]
      }
    ],
    "package": {
      "name": "keystone",
      "purl": "pkg:deb/ubuntu/keystone?arch=source&distro=jammy",
      "ecosystem": "Ubuntu:22.04:LTS"
    },
    "versions": [
      "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",
      "2:21.0.0-0ubuntu1",
      "2:21.0.1-0ubuntu1",
      "2:21.0.1-0ubuntu2",
      "2:21.0.1-0ubuntu2.1",
      "2:21.0.1-0ubuntu2.2"
    ],
    "database_specific": {
      "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-40683.json"
    },
    "ecosystem_specific": {
      "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"
        }
      ],
      "availability": "No subscription required"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "2:25.0.0-0ubuntu1.4"
          }
        ]
      }
    ],
    "package": {
      "name": "keystone",
      "purl": "pkg:deb/ubuntu/keystone?arch=source&distro=noble",
      "ecosystem": "Ubuntu:24.04:LTS"
    },
    "versions": [
      "2:24.0.0-0ubuntu1",
      "2:24.0.0+git2024011916.adfa92b4-0ubuntu1",
      "2:25.0.0~rc1-0ubuntu1",
      "2:25.0.0-0ubuntu1",
      "2:25.0.0-0ubuntu1.1",
      "2:25.0.0-0ubuntu1.2"
    ],
    "database_specific": {
      "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-40683.json"
    },
    "ecosystem_specific": {
      "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"
        }
      ],
      "availability": "No subscription required"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "2:28.0.0-0ubuntu1.3"
          }
        ]
      }
    ],
    "package": {
      "name": "keystone",
      "purl": "pkg:deb/ubuntu/keystone?arch=source&distro=questing",
      "ecosystem": "Ubuntu:25.10"
    },
    "versions": [
      "2:27.0.0-0ubuntu1",
      "2:27.0.0+git2025080113.e066e18ab-0ubuntu1",
      "2:28.0.0~rc1-0ubuntu1",
      "2:28.0.0-0ubuntu1",
      "2:28.0.0-0ubuntu1.1"
    ],
    "database_specific": {
      "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-40683.json"
    },
    "ecosystem_specific": {
      "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"
        }
      ],
      "availability": "No subscription required"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event: #47091 · Revision 1
Added to Heist Feed: Sun, 25 Oct 2026 13:09:26 GMT
Publisher date: Tue, 14 Apr 2026 20:16:00 GMT

Read the original announcement