Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
AV AC PR UI S C I A CVSS EPSS %ile KEV N L L N U H H H 8.8 .0030 23.0 —
AFFECTED Product Versions Fixed Keystone 14.0.0 – —
TIMELINE May 1 Reserved by mitre May 28 EXPLOIT PUBLISHED — CVE-2026-42998 (OpenStack Keystone). Public exploit reference added. May 28 Published (CNA: mitre)
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.
| Date | Event | Detail |
|---|---|---|
| May 1, 2026 | Reserved | Reserved by mitre |
| May 28, 2026 | EXPLOIT PUBLISHED | EXPLOIT PUBLISHED — CVE-2026-42998 (OpenStack Keystone). Public exploit reference added. |
| May 28, 2026 | Published | Published (CNA: mitre) |
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|---|---|---|---|
| OpenStack | Keystone | — | 14.0.0 | — |
Authoritative record: CVE-2026-42998 at cve.org
Vendors: openstack
Weaknesses: CWE-863
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-42998 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.