# CVE-2026-42998: keystone: An issue was discovered in OpenStack Keystone before 29.0.2

CVE-2026-42998 is fixed in 3 products on 1 platform, first by keystone 2:29.0.0-0ubuntu1.2, released May 28, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-42998
- Priority: High
- CVSS: 8.8 (high)
- EPSS: 0.0030
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 28, 2026

## Description

An issue was discovered in OpenStack Keystone before 29.0.2. The Keystone application credential authentication plugin does not verify that the user supplied in the authentication request matches the owner of the application credential. An attacker can authenticate with their own application credential ID and secret while specifying a different user's name and domain in the request body. Keystone issues a token attributed to the victim user. The impersonated token is project-scoped and carries the intersection of the application credential's roles and the victim's actual roles on the project. This enables audit evasion, reading the victim's credentials, and acting as the victim within shared projects.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | keystone Debian 12.15 (bookworm) | 2:22.0.2-0+deb12u3 | [DEBIAN-CVE-2026-42998](https://patchblox.com/security/data/fix/linux/debian-cve-2026-42998.md) | Jun 24, 2026 |
| Linux | keystone Debian 13.5 (trixie) | 2:27.0.0-3+deb13u4 | [DEBIAN-CVE-2026-42998](https://patchblox.com/security/data/fix/linux/debian-cve-2026-42998.md) | Jun 24, 2026 |
| Linux | keystone Debian 14 | 2:29.0.1-2 | [DEBIAN-CVE-2026-42998](https://patchblox.com/security/data/fix/linux/debian-cve-2026-42998.md) | Jun 24, 2026 |
| Linux | keystone Ubuntu 22.04.1 LTS (jammy) | 2:21.0.1-0ubuntu2.4 | [keystone 2:21.0.1-0ubuntu2.4](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-keystone-2-21.0.1-0ubuntu2.4.md) | Jun 24, 2026 |
| Linux | keystone Ubuntu 24.04.5 LTS (noble) | 2:25.0.0-0ubuntu1.4 | [keystone 2:25.0.0-0ubuntu1.4](https://patchblox.com/security/data/fix/linux/ubuntu-noble-keystone-2-25.0.0-0ubuntu1.4.md) | Jun 24, 2026 |
| Linux | keystone Ubuntu 25.10 (questing) | 2:28.0.0-0ubuntu1.3 | [keystone 2:28.0.0-0ubuntu1.3](https://patchblox.com/security/data/fix/linux/ubuntu-questing-keystone-2-28.0.0-0ubuntu1.3.md) | Jun 24, 2026 |
| Linux | keystone Ubuntu 26.04.1 LTS (resolute) | 2:29.0.0-0ubuntu1.2 | [keystone 2:29.0.0-0ubuntu1.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-keystone-2-29.0.0-0ubuntu1.2.md) | May 28, 2026 |
| Linux | keystone-common Ubuntu 22.04.1 LTS (jammy) | 2:21.0.1-0ubuntu2.4 | [keystone-common 2:21.0.1-0ubuntu2.4](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-keystone-common-2-21.0.1-0ubuntu2.4.md) | Jun 24, 2026 |
| Linux | keystone-common Ubuntu 24.04.5 LTS (noble) | 2:25.0.0-0ubuntu1.4 | [keystone-common 2:25.0.0-0ubuntu1.4](https://patchblox.com/security/data/fix/linux/ubuntu-noble-keystone-common-2-25.0.0-0ubuntu1.4.md) | Jun 24, 2026 |
| Linux | keystone-common Ubuntu 25.10 (questing) | 2:28.0.0-0ubuntu1.3 | [keystone-common 2:28.0.0-0ubuntu1.3](https://patchblox.com/security/data/fix/linux/ubuntu-questing-keystone-common-2-28.0.0-0ubuntu1.3.md) | Jun 24, 2026 |
| Linux | keystone-common Ubuntu 26.04.1 LTS (resolute) | 2:29.0.0-0ubuntu1.2 | [keystone-common 2:29.0.0-0ubuntu1.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-keystone-common-2-29.0.0-0ubuntu1.2.md) | May 28, 2026 |
| Linux | python3-keystone Ubuntu 22.04.1 LTS (jammy) | 2:21.0.1-0ubuntu2.4 | [python3-keystone 2:21.0.1-0ubuntu2.4](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-python3-keystone-2-21.0.1-0ubuntu2.4.md) | Jun 24, 2026 |
| Linux | python3-keystone Ubuntu 24.04.5 LTS (noble) | 2:25.0.0-0ubuntu1.4 | [python3-keystone 2:25.0.0-0ubuntu1.4](https://patchblox.com/security/data/fix/linux/ubuntu-noble-python3-keystone-2-25.0.0-0ubuntu1.4.md) | Jun 24, 2026 |
| Linux | python3-keystone Ubuntu 25.10 (questing) | 2:28.0.0-0ubuntu1.3 | [python3-keystone 2:28.0.0-0ubuntu1.3](https://patchblox.com/security/data/fix/linux/ubuntu-questing-python3-keystone-2-28.0.0-0ubuntu1.3.md) | Jun 24, 2026 |
| Linux | python3-keystone Ubuntu 26.04.1 LTS (resolute) | 2:29.0.0-0ubuntu1.2 | [python3-keystone 2:29.0.0-0ubuntu1.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-python3-keystone-2-29.0.0-0ubuntu1.2.md) | May 28, 2026 |

---

Data as of 2026-11-08T00:53:09Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.