CVE catalog
CVE-2026-43000
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 adm
- Severity
- High · CVSS 8.4
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:L - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.33% · Oct 27, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | keystone | sid | 2:30.0.0-3 | fixed |
| Debian | keystone | forky | 2:30.0.0-3 | fixed |
| Debian | keystone | trixie | 2:27.0.0-3+deb13u5 | fixed |
| Debian | keystone | trixie-security | 2:27.0.0-3+deb13u6 | fixed |
| Debian | keystone | bookworm | 2:22.0.2-0+deb12u3 | fixed |
| Debian | keystone | bookworm-security | 2:22.0.2-0+deb12u6 | fixed |
| Cpe | keystone | Not reported | 2:25.0.0-0ubuntu1.4 | fixed |
| Cpe | keystone-common | Not reported | 2:25.0.0-0ubuntu1.4 | fixed |
| Cpe | keystone-doc | Not reported | 2:25.0.0-0ubuntu1.4 | fixed |
| Cpe | python3-keystone | Not reported | 2:25.0.0-0ubuntu1.4 | fixed |
| Cpe | keystone | Not reported | 27.0.2 | fixed |
| Cpe | keystone | Not reported | 28.0.2 | fixed |
| Cpe | keystone | Not reported | 29.0.2 | fixed |
| Ubuntu | keystone | pro | 2:16.0.0-0ubuntu1 | vulnerable |
| Ubuntu | keystone | pro | 2:17.0.0~b1~git2019121613.db81fee63-0ubuntu1 | vulnerable |
| Ubuntu | keystone | pro | 2:17.0.0~b2~git2020020513.99733f172-0ubuntu1 | vulnerable |
| Ubuntu | keystone | pro | 2:17.0.0~b3~git2020032415.9f9040257-0ubuntu1 | vulnerable |
| Ubuntu | keystone | pro | 2:17.0.0~b3~git2020032415.9f9040257-0ubuntu2 | vulnerable |
| Ubuntu | keystone | pro | 2:17.0.0~b3~git2020041013.7bb6314e4-0ubuntu1 | vulnerable |
| Ubuntu | keystone | pro | 2:17.0.0-0ubuntu0.20.04.1 | vulnerable |
| Ubuntu | keystone | pro | 2:17.0.1-0ubuntu1 | vulnerable |
| Ubuntu | keystone | pro | 2:17.0.1-0ubuntu2 | vulnerable |
| Ubuntu | keystone | pro | 2:17.0.1-0ubuntu2+esm1 | vulnerable |
| Ubuntu | keystone | pro | 2:17.0.1-0ubuntu2+esm2 | vulnerable |
| Ubuntu | keystone | 22.04 | 2:20.0.0-0ubuntu1 | vulnerable |
| Ubuntu | keystone | 22.04 | 2:20.0.0+git2021120815.2ddf8f321-0ubuntu1 | vulnerable |
| Ubuntu | keystone | 22.04 | 2:20.0.0+git2022011217.771c943ad-0ubuntu1 | vulnerable |
| Ubuntu | keystone | 22.04 | 2:20.0.0+git2022030313.a3fc9e7c3-0ubuntu1 | vulnerable |
| Ubuntu | keystone | 22.04 | 2:21.0.0-0ubuntu1 | vulnerable |
| Ubuntu | keystone | 22.04 | 2:21.0.1-0ubuntu1 | vulnerable |
| Ubuntu | keystone | 22.04 | 2:21.0.1-0ubuntu2 | vulnerable |
| Ubuntu | keystone | 22.04 | 2:21.0.1-0ubuntu2.1 | vulnerable |
| Ubuntu | keystone | 22.04 | 2:21.0.1-0ubuntu2.2 | vulnerable |
| Ubuntu | keystone | 22.04 | 2:21.0.1-0ubuntu2.4 | fixed |
| Ubuntu | keystone | 24.04 | 2:24.0.0-0ubuntu1 | vulnerable |
| Ubuntu | keystone | 24.04 | 2:24.0.0+git2024011916.adfa92b4-0ubuntu1 | vulnerable |
| Ubuntu | keystone | 24.04 | 2:25.0.0~rc1-0ubuntu1 | vulnerable |
| Ubuntu | keystone | 24.04 | 2:25.0.0-0ubuntu1 | vulnerable |
| Ubuntu | keystone | 24.04 | 2:25.0.0-0ubuntu1.1 | vulnerable |
| Ubuntu | keystone | 24.04 | 2:25.0.0-0ubuntu1.2 | vulnerable |
| Ubuntu | keystone | 24.04 | 2:25.0.0-0ubuntu1.4 | fixed |
| Ubuntu | keystone | 25.10 | 2:27.0.0-0ubuntu1 | vulnerable |
| Ubuntu | keystone | 25.10 | 2:27.0.0+git2025080113.e066e18ab-0ubuntu1 | vulnerable |
| Ubuntu | keystone | 25.10 | 2:28.0.0~rc1-0ubuntu1 | vulnerable |
| Ubuntu | keystone | 25.10 | 2:28.0.0-0ubuntu1 | vulnerable |
| Ubuntu | keystone | 25.10 | 2:28.0.0-0ubuntu1.1 | vulnerable |
| Ubuntu | keystone | 25.10 | 2:28.0.0-0ubuntu1.3 | fixed |
| Ubuntu | keystone | 26.04 | 2:28.0.0-0ubuntu1 | vulnerable |
| Ubuntu | keystone | 26.04 | 2:28.0.0-0ubuntu2 | vulnerable |
| Ubuntu | keystone | 26.04 | 2:28.0.0+git20260119.61.8a42793e7-0ubuntu1 | vulnerable |
| Ubuntu | keystone | 26.04 | 2:29.0.0~rc1-0ubuntu1 | vulnerable |
| Ubuntu | keystone | 26.04 | 2:29.0.0-0ubuntu1 | vulnerable |
| Ubuntu | keystone | 26.04 | 2:29.0.0-0ubuntu1.2 | fixed |
| Cpe | keystone | Not reported | 29.0.2 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | keystone | source | sid | 2:29.0.1-2 | not yet assigned | Not reported | Not reported |
| Debian | keystone | source | forky | 2:29.0.1-2 | not yet assigned | Not reported | Not reported |
| Debian | keystone | source | trixie | 2:27.0.0-3+deb13u4 | not yet assigned | Not reported | Not reported |
| Debian | keystone | source | bookworm | 2:22.0.2-0+deb12u3 | not yet assigned | Not reported | Not reported |
| Cpe | keystone | cpe | Not reported | 2:25.0.0-0ubuntu1.4 | Not reported | Not reported | Not reported |
| Cpe | keystone-common | cpe | Not reported | 2:25.0.0-0ubuntu1.4 | Not reported | Not reported | Not reported |
| Cpe | keystone-doc | cpe | Not reported | 2:25.0.0-0ubuntu1.4 | Not reported | Not reported | Not reported |
| Cpe | python3-keystone | cpe | Not reported | 2:25.0.0-0ubuntu1.4 | Not reported | Not reported | Not reported |
| Cpe | keystone | cpe | Not reported | 27.0.2 | Not reported | Not reported | Not reported |
| Cpe | keystone | cpe | Not reported | 28.0.2 | Not reported | Not reported | Not reported |
| Cpe | keystone | cpe | Not reported | 29.0.2 | Not reported | Not reported | Not reported |
| Ubuntu | keystone | deb | 22.04 | 2:21.0.1-0ubuntu2.4 | Not reported | UBUNTU-CVE-2026-43000 | Not reported |
| Ubuntu | keystone | deb | 24.04 | 2:25.0.0-0ubuntu1.4 | Not reported | UBUNTU-CVE-2026-43000 | Not reported |
| Ubuntu | keystone | deb | 25.10 | 2:28.0.0-0ubuntu1.3 | Not reported | UBUNTU-CVE-2026-43000 | Not reported |
| Ubuntu | keystone | deb | 26.04 | 2:29.0.0-0ubuntu1.2 | Not reported | UBUNTU-CVE-2026-43000 | Not reported |
| Cpe | keystone | cpe | Not reported | 29.0.2 | Not reported | NVD-CVE-2026-43000 | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [keystone]Fixed
Details (4)
2:22.0.2-0+deb12u3· all · bookwormFixed · Fixed:
2:22.0.2-0+deb12u3nvd · keystone · debian · bookworm; nvd · keystone · debian · 12
2:22.0.2-0+deb12u3· all · bookwormFixed · Fixed:
2:22.0.2-0+deb12u3nvd · keystone · debian · bookworm; nvd · keystone · debian · 12
2:22.0.2-0+deb12u3· all · bookworm-securityFixed · Fixed:
2:22.0.2-0+deb12u3nvd · keystone · debian · bookworm; nvd · keystone · debian · 12
2:22.0.2-0+deb12u3· all · bookworm-securityFixed · Fixed:
2:22.0.2-0+deb12u3nvd · keystone · debian · bookworm; nvd · keystone · debian · 12
- [keystone-doc]Fixed
Source package: [keystone]
Details (4)
2:22.0.2-0+deb12u3· all · bookwormFixed · Fixed:
2:22.0.2-0+deb12u3nvd · keystone · debian · bookworm; nvd · keystone · debian · 12
2:22.0.2-0+deb12u3· all · bookwormFixed · Fixed:
2:22.0.2-0+deb12u3nvd · keystone · debian · bookworm; nvd · keystone · debian · 12
2:22.0.2-0+deb12u3· all · bookworm-securityFixed · Fixed:
2:22.0.2-0+deb12u3nvd · keystone · debian · bookworm; nvd · keystone · debian · 12
2:22.0.2-0+deb12u3· all · bookworm-securityFixed · Fixed:
2:22.0.2-0+deb12u3nvd · keystone · debian · bookworm; nvd · keystone · debian · 12
- [python3-keystone]Fixed
Source package: [keystone]
Details (4)
2:22.0.2-0+deb12u3· all · bookwormFixed · Fixed:
2:22.0.2-0+deb12u3nvd · keystone · debian · bookworm; nvd · keystone · debian · 12
2:22.0.2-0+deb12u3· all · bookwormFixed · Fixed:
2:22.0.2-0+deb12u3nvd · keystone · debian · bookworm; nvd · keystone · debian · 12
2:22.0.2-0+deb12u3· all · bookworm-securityFixed · Fixed:
2:22.0.2-0+deb12u3nvd · keystone · debian · bookworm; nvd · keystone · debian · 12
2:22.0.2-0+deb12u3· all · bookworm-securityFixed · Fixed:
2:22.0.2-0+deb12u3nvd · keystone · debian · bookworm; nvd · keystone · debian · 12
[Debian 13 (Trixie)]
- [keystone]Fixed
Details (6)
2:27.0.0-3+deb13u4· all · trixieFixed · Fixed:
2:27.0.0-3+deb13u4nvd · keystone · debian · 13
2:27.0.0-3+deb13u4· all · trixieFixed · Fixed:
2:27.0.0-3+deb13u4nvd · keystone · debian · 13
2:27.0.0-3+deb13u4· all · trixie-securityFixed · Fixed:
2:27.0.0-3+deb13u4nvd · keystone · debian · 13
2:27.0.0-3+deb13u4· all · trixie-security · Historical versionFixed · Fixed:
2:27.0.0-3+deb13u4nvd · keystone · debian · 13
2:27.0.0-3+deb13u5· all · trixie-security · Historical versionFixed · Fixed:
2:27.0.0-3+deb13u4nvd · keystone · debian · 13
2:27.0.0-3+deb13u6· all · trixie-securityFixed · Fixed:
2:27.0.0-3+deb13u4nvd · keystone · debian · 13
- [keystone-doc]Fixed
Source package: [keystone]
Details (6)
2:27.0.0-3+deb13u4· all · trixieFixed · Fixed:
2:27.0.0-3+deb13u4nvd · keystone · debian · 13
2:27.0.0-3+deb13u4· all · trixieFixed · Fixed:
2:27.0.0-3+deb13u4nvd · keystone · debian · 13
2:27.0.0-3+deb13u4· all · trixie-securityFixed · Fixed:
2:27.0.0-3+deb13u4nvd · keystone · debian · 13
2:27.0.0-3+deb13u4· all · trixie-security · Historical versionFixed · Fixed:
2:27.0.0-3+deb13u4nvd · keystone · debian · 13
2:27.0.0-3+deb13u5· all · trixie-security · Historical versionFixed · Fixed:
2:27.0.0-3+deb13u4nvd · keystone · debian · 13
2:27.0.0-3+deb13u6· all · trixie-securityFixed · Fixed:
2:27.0.0-3+deb13u4nvd · keystone · debian · 13
- [python3-keystone]Fixed
Source package: [keystone]
Details (6)
2:27.0.0-3+deb13u4· all · trixieFixed · Fixed:
2:27.0.0-3+deb13u4nvd · keystone · debian · 13
2:27.0.0-3+deb13u4· all · trixieFixed · Fixed:
2:27.0.0-3+deb13u4nvd · keystone · debian · 13
2:27.0.0-3+deb13u4· all · trixie-securityFixed · Fixed:
2:27.0.0-3+deb13u4nvd · keystone · debian · 13
2:27.0.0-3+deb13u4· all · trixie-security · Historical versionFixed · Fixed:
2:27.0.0-3+deb13u4nvd · keystone · debian · 13
2:27.0.0-3+deb13u5· all · trixie-security · Historical versionFixed · Fixed:
2:27.0.0-3+deb13u4nvd · keystone · debian · 13
2:27.0.0-3+deb13u6· all · trixie-securityFixed · Fixed:
2:27.0.0-3+deb13u4nvd · keystone · debian · 13
Observed:
References
- [https://access.redhat.com/security/cve/CVE-2026-43000]
- [https://bugs.launchpad.net/keystone/+bug/2148477]
- [https://bugzilla.redhat.com/show_bug.cgi?id=2482826]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-43000]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-43000]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2026-43000]
- [https://security-tracker.debian.org/tracker/CVE-2026-43000]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43000.json]
- [https://security.openstack.org/ossa/OSSA-2026-015.html]
- [https://ubuntu.com/security/notices/USN-8433-1]
[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [Ubuntu Security Notices (USN)]