UnratedFix available

UBUNTU-CVE-2026-42999

Type: advisorySource: OSV1 source record

An issue was discovered in OpenStack Keystone before 29.0.2. The Keystone RBAC policy enforcer in enforce_call unconditionally merges the raw JSON request body into the policy enforcement dictionary via policy_dict.update(json_input.copy()), overwriting trusted target data that was previously set from database lookups. Because flask.request.get_json 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., user_id, project_id) 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).

Announced 28 May 2026Source revision 1

Original source ↗

UBUNTU-CVE-2026-42999

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-2026-42999

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

keystone

Source reference: /affected/6/package/name

Affected versions: 2:28.0.0-0ubuntu1
Source reference: /affected/6/versions
2:28.0.0-0ubuntu2
Source reference: /affected/6/versions
2:28.0.0+git20260119.61.8a42793e7-0ubuntu1
Source reference: /affected/6/versions
2:29.0.0~rc1-0ubuntu1
Source reference: /affected/6/versions
2:29.0.0-0ubuntu1
Source reference: /affected/6/versions
Fixed versions: 2:29.0.0-0ubuntu1.2
Source reference: /affected/6/ranges
Prerequisites: Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

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        "events": [
          {
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    "package": {
      "name": "keystone",
      "purl": "pkg:deb/ubuntu/keystone?arch=source&distro=esm-infra-legacy%2Fxenial",
      "ecosystem": "Ubuntu:Pro:16.04:LTS"
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      "2:9.0.0~b2-0ubuntu1",
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      "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-2026-42999.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"
        }
      ]
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  },
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    "package": {
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      "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-2026-42999.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"
        }
      ]
    }
  },
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    "ranges": [
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      "ecosystem": "Ubuntu:Pro:20.04:LTS"
    },
    "versions": [
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      "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-2026-42999.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-2026-42999.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"
          },
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          }
        ]
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    ],
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      "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-2026-42999.json"
    },
    "ecosystem_specific": {
      "binaries": [
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          "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"
    ],
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    },
    "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"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
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          }
        ]
      }
    ],
    "package": {
      "name": "keystone",
      "purl": "pkg:deb/ubuntu/keystone?arch=source&distro=resolute",
      "ecosystem": "Ubuntu:26.04:LTS"
    },
    "versions": [
      "2:28.0.0-0ubuntu1",
      "2:28.0.0-0ubuntu2",
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      "2:29.0.0~rc1-0ubuntu1",
      "2:29.0.0-0ubuntu1"
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    "database_specific": {
      "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42999.json"
    },
    "ecosystem_specific": {
      "binaries": [
        {
          "binary_name": "keystone",
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        },
        {
          "binary_name": "keystone-common",
          "binary_version": "2:29.0.0-0ubuntu1.2"
        },
        {
          "binary_name": "python3-keystone",
          "binary_version": "2:29.0.0-0ubuntu1.2"
        }
      ],
      "availability": "No subscription required"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event: #47077 · Revision 1
Added to Heist Feed: Sun, 25 Oct 2026 13:09:18 GMT
Publisher date: Thu, 28 May 2026 19:16:00 GMT

Read the original announcement