CVE-2026-42998_CVE-2026-42998

6 / 10

MEDIUM

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:L

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.

Basic Information

ID CVE-2026-42998

Source mitre

Published May 28, 2026 at 00:00

Modified May 28, 2026 at 18:34

Affected Product

Vendor OpenStack

Product Keystone

Version 14.0.0

Affected Versions OpenStack Keystone 14.0.0
OpenStack Keystone 28.0.0
OpenStack Keystone 29.0.0

CWE Classification

CWE-863

References

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    "published": "2026-05-28T00:00:00.000Z",
    "modified": "2026-05-28T18:34:45.371Z",
    "type": "cve",
    "title": "CVE-2026-42998",
    "source": "mitre",
    "references": "https://bugs.launchpad.net/keystone/+bug/2148477\nhttps://security.openstack.org/ossa/OSSA-2026-015.html",
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