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ubuntu-cve-2026-43001
Vulnerability from osv_ubuntu
Published
2026-05-01 09:16
Modified
2026-06-30 16:21
Summary
Details

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

Severity
7.9 (High)
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:L
8.0 (High)
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
8.0 (High)
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "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"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "keystone",
        "purl": "pkg:deb/ubuntu/keystone@2:9.3.0-0ubuntu3.2?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "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"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "keystone",
            "binary_version": "2:13.0.4-0ubuntu1"
          },
          {
            "binary_name": "python-keystone",
            "binary_version": "2:13.0.4-0ubuntu1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "keystone",
        "purl": "pkg:deb/ubuntu/keystone@2:13.0.4-0ubuntu1?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "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"
      ]
    },
    {
      "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"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:20.04:LTS",
        "name": "keystone",
        "purl": "pkg:deb/ubuntu/keystone@2:17.0.1-0ubuntu2+esm1?arch=source\u0026distro=esm-infra/focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "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"
      ]
    },
    {
      "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"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "keystone",
        "purl": "pkg:deb/ubuntu/keystone@2:21.0.1-0ubuntu2.4?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2:21.0.1-0ubuntu2.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "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"
      ]
    },
    {
      "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"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "keystone",
        "purl": "pkg:deb/ubuntu/keystone@2:25.0.0-0ubuntu1.4?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2:25.0.0-0ubuntu1.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "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"
      ]
    },
    {
      "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"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "keystone",
        "purl": "pkg:deb/ubuntu/keystone@2:28.0.0-0ubuntu1.3?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2:28.0.0-0ubuntu1.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "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"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "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",
            "binary_version": "2:29.0.0-0ubuntu1.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "keystone",
        "purl": "pkg:deb/ubuntu/keystone@2:29.0.0-0ubuntu1.2?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2:29.0.0-0ubuntu1.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2:28.0.0-0ubuntu1",
        "2:28.0.0-0ubuntu2",
        "2:28.0.0+git20260119.61.8a42793e7-0ubuntu1",
        "2:29.0.0~rc1-0ubuntu1",
        "2:29.0.0-0ubuntu1"
      ]
    }
  ],
  "aliases": [],
  "details": "An issue was discovered in OpenStack Keystone before 29.0.2. POST /v3/credentials did not validate that the caller-supplied project_id 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 app_cred_id, enabling cross-project lateral movement within the credential owner\u0027s role footprint.",
  "id": "UBUNTU-CVE-2026-43001",
  "modified": "2026-06-30T16:21:00Z",
  "published": "2026-05-01T09:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-43001"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-43001"
    },
    {
      "type": "REPORT",
      "url": "https://bugs.launchpad.net/keystone/+bug/2149775"
    },
    {
      "type": "REPORT",
      "url": "https://review.opendev.org/c/openstack/keystone/+/985804"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8433-1"
    }
  ],
  "related": [
    "USN-8433-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-43001"
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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Nomenclature

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