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CVE-2026-43000

CVE-2026-43000

This page contains facts from public vulnerability sources. Check the original advisory before updating.

An issue was discovered in OpenStack Keystone before 29.0.2. When combined with an application credential impersonation vulnerability, an attacker with the member role on a project can escalate to admin by chaining unrestricted application credentials with Keystone trusts. The impersonated token carries the victim's identity, which passes the trustor validation check. Keystone then validates the delegated roles against the victim's actual role assignments in the database, not the roles on the requesting token. This allows the attacker to create a trust delegating the victim's admin role to themselves. The trust persists independently, and additional trusts and application credentials can be created to maintain access. All actions are logged under the victim's identity.

CVSS 6.0 · Medium · EPSS 0.4% · Fix available

Published
Updated

Stack: system · python

Affected products and versions

  • keystone

    Versions
    • ≥ 14.0.0, < 27.0.2: Affected (semver)
    • ≥ 28.0.0, < 28.0.2: Affected (semver)
    • ≥ 29.0.0, < 29.0.2: Affected (semver)

    Update to 27.0.2; Update to 28.0.2; Update to 29.0.2

  • keystone Debian:12

    Versions
    • 2:22.0.0-2
    • 2:22.0.2-0+deb12u1
    • 2:22.0.2-0+deb12u2
    Affected ranges
    • ECOSYSTEM: < 2:22.0.2-0+deb12u3

    Update to 2:22.0.2-0+deb12u3

  • keystone Debian:13

    Versions
    • 2:27.0.0-3
    • 2:27.0.0-3+deb13u1
    • 2:27.0.0-3+deb13u3
    Affected ranges
    • ECOSYSTEM: < 2:27.0.0-3+deb13u4

    Update to 2:27.0.0-3+deb13u4

  • keystone Debian:14

    Versions
    • 2:27.0.0-3
    • 2:28.0.0-1
    • 2:28.0.0-2
    • 2:28.0.0-3
    • 2:28.0.0-4
    • 2:28.0.0-5
    • 2:28.0.0-6
    • 2:28.0.0~rc1-1
    • 2:28.0.0~rc1-2
    • 2:28.0.0~rc1-4
    • 2:29.0.0-1
    • 2:29.0.0-2
    • 2:29.0.0-3
    • 2:29.0.0~rc1-1
    • 2:29.0.0~rc1-2
    • 2:29.0.1-1
    Affected ranges
    • ECOSYSTEM: < 2:29.0.1-2

    Update to 2:29.0.1-2

  • keystone PyPI

    Versions
    • 14.0.0
    • 14.0.1
    • 14.1.0
    • 14.2.0
    • 15.0.0
    • 15.0.0.0rc1
    • 15.0.0.0rc2
    • 15.0.1
    • 16.0.0
    • 16.0.0.0rc1
    • 16.0.0.0rc2
    • 16.0.1
    • 16.0.2
    • 17.0.0
    • 17.0.0.0rc1
    • 17.0.0.0rc2
    • 17.0.1
    • 18.0.0
    • 18.0.0.0rc1
    • 18.1.0
    • 19.0.0
    • 19.0.0.0rc1
    • 19.0.0.0rc2
    • 19.0.1
    • 20.0.0
    • 20.0.0.0rc1
    • 20.0.1
    • 21.0.0
    • 21.0.0.0rc1
    • 21.0.1
    • 22.0.0
    • 22.0.0.0rc1
    • 22.0.1
    • 22.0.2
    • 23.0.0
    • 23.0.0.0rc1
    • 23.0.1
    • 23.0.2
    • 24.0.0
    • 24.0.0.0rc1
    • 24.1.0
    • 25.0.0
    • 25.0.0.0rc1
    • 26.0.0
    • 26.0.0.0rc1
    • 26.1.0
    • 26.1.1
    • 27.0.0
    • 27.0.0.0rc1
    • 27.0.1
    Affected ranges
    • ECOSYSTEM: ≥ 14.0.0, < 27.0.2

    Update to 27.0.2

  • keystone PyPI

    Versions
    • 28.0.0
    • 28.0.1
    Affected ranges
    • ECOSYSTEM: ≥ 28.0.0, < 28.0.2

    Update to 28.0.2

  • keystone PyPI

    Versions
    • 29.0.0
    • 29.0.1
    Affected ranges
    • ECOSYSTEM: ≥ 29.0.0, < 29.0.2

    Update to 29.0.2

  • keystone PyPI

    Versions
    • 14.0.0
    • 14.0.1
    • 14.1.0
    • 14.2.0
    • 15.0.0
    • 15.0.0.0rc1
    • 15.0.0.0rc2
    • 15.0.1
    • 16.0.0
    • 16.0.0.0rc1
    • 16.0.0.0rc2
    • 16.0.1
    • 16.0.2
    • 17.0.0
    • 17.0.0.0rc1
    • 17.0.0.0rc2
    • 17.0.1
    • 18.0.0
    • 18.0.0.0rc1
    • 18.1.0
    • 19.0.0
    • 19.0.0.0rc1
    • 19.0.0.0rc2
    • 19.0.1
    • 20.0.0
    • 20.0.0.0rc1
    • 20.0.1
    • 21.0.0
    • 21.0.0.0rc1
    • 21.0.1
    • 22.0.0
    • 22.0.0.0rc1
    • 22.0.1
    • 22.0.2
    • 23.0.0
    • 23.0.0.0rc1
    • 23.0.1
    • 23.0.2
    • 24.0.0
    • 24.0.0.0rc1
    • 24.1.0
    • 25.0.0
    • 25.0.0.0rc1
    • 26.0.0
    • 26.0.0.0rc1
    • 26.1.0
    • 26.1.1
    • 27.0.0
    • 27.0.0.0rc1
    • 27.0.1
    • 28.0.0
    • 28.0.1
    • 29.0.0
    • 29.0.1
    Affected ranges
    • ECOSYSTEM: ≥ 14.0.0, < 27.0.2 ∪ ≥ 28.0.0, < 28.0.2 ∪ ≥ 29.0.0, < 29.0.2

    Update to 27.0.2; Update to 28.0.2; Update to 29.0.2

  • keystone 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
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • keystone 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
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • keystone 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
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • keystone 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
    Affected ranges
    • ECOSYSTEM: < 2:21.0.1-0ubuntu2.4

    Update to 2:21.0.1-0ubuntu2.4

  • keystone 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
    Affected ranges
    • ECOSYSTEM: < 2:25.0.0-0ubuntu1.4

    Update to 2:25.0.0-0ubuntu1.4

  • keystone 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
    Affected ranges
    • ECOSYSTEM: < 2:28.0.0-0ubuntu1.3

    Update to 2:28.0.0-0ubuntu1.3

  • keystone Ubuntu:26.04:LTS

    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
    Affected ranges
    • ECOSYSTEM: < 2:29.0.0-0ubuntu1.2

    Update to 2:29.0.0-0ubuntu1.2

Original sources

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