CVE-2026-42998
Detail
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.
Metrics
NVD enrichment efforts reference publicly available information to associate
vector strings. CVSS information contributed by other sources is also
displayed.
CVSS 4.0 Severity and Vector Strings:
NVD assessment
not yet provided.
CVSS 3.x Severity and Vector Strings:
Vector:
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:L
CVSS 2.0 Severity and Vector Strings:
Base
Score:
NVD assessment
not yet provided.
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Weakness Enumeration
| CWE-ID |
CWE Name |
Source |
|
CWE-863
|
Incorrect Authorization |
MITRE
|
Change History
4 change records found show changes
CVE Modified by CISA-ADP
6/17/2026 6:48:44 AM
| Action |
Type |
Old Value |
New Value |
| Added |
SSVC |
{"timestamp":"2026-05-28T19:38:16.911205Z","id":"CVE-2026-42998","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}
|
CVE Modified by MITRE
6/17/2026 6:48:44 AM
| Action |
Type |
Old Value |
New Value |
| Added |
Affected |
[{"vendor":"OpenStack","product":"Keystone","defaultStatus":"unaffected","versions":[{"version":"14.0.0","lessThan":"27.0.2","versionType":"semver","status":"affected"},{"version":"28.0.0","lessThan":"28.0.2","versionType":"semver","status":"affected"},{"version":"29.0.0","lessThan":"29.0.2","versionType":"semver","status":"affected"}]}]
|
Initial Analysis by NIST
6/02/2026 10:50:36 AM
| Action |
Type |
Old Value |
New Value |
| Added |
CVSS V3.1 |
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
|
| Added |
CPE Configuration |
OR
*cpe:2.3:a:openstack:keystone:*:*:*:*:*:*:*:* versions from (including) 28.0.0 up to (excluding) 28.0.2
*cpe:2.3:a:openstack:keystone:*:*:*:*:*:*:*:* versions from (including) 29.0.0 up to (excluding) 29.0.2
*cpe:2.3:a:openstack:keystone:*:*:*:*:*:*:*:* versions from (including) 14.0.0 up to (excluding) 27.0.2
|
| Added |
Reference Type |
MITRE: https://bugs.launchpad.net/keystone/+bug/2148477 Types: Exploit, Issue Tracking, Patch, Third Party Advisory
|
| Added |
Reference Type |
MITRE: https://security.openstack.org/ossa/OSSA-2026-015.html Types: Patch, Vendor Advisory
|
New CVE Received from MITRE
5/28/2026 3:16:37 PM
| Action |
Type |
Old Value |
New Value |
| Added |
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.
|
| Added |
CVSS V3.1 |
AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:L
|
| Added |
CWE |
CWE-863
|
| Added |
Reference |
https://bugs.launchpad.net/keystone/+bug/2148477
|
| Added |
Reference |
https://security.openstack.org/ossa/OSSA-2026-015.html
|
Quick Info
CVE Dictionary Entry: CVE-2026-42998 NVD
Published Date: 05/28/2026 NVD
Last Modified: 06/17/2026
Source: MITRE
|
