CVE detail
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 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.
Buzz score
Why this CVE is surfacing
This all-time snapshot uses the same composite formula as Trending across a 30-year evidence window, rather than a current rolling window.
Buzz score components · mention 17.9 · diversity 14.5 · KEV 0.0 · OTX 0.0 · PoC 0.0
Why it matters now
Mention timeline
- Total mentions
- 0
- within the 30d window
- Peak daily
- 0
- highest bucket
Evidence
Source links by recency
5 source links · newest first
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43000.jsonsecurity.access.redhat.com
No excerpt available.
Vendor Advisorysecurity.access.redhat.comMay 28, 2026, 7:16 PM - https://bugzilla.redhat.com/show_bug.cgi?id=2482826bugzilla.redhat.com
No excerpt available.
Exploitbugzilla.redhat.comMay 28, 2026, 7:16 PM - https://access.redhat.com/security/cve/CVE-2026-43000access.redhat.com
No excerpt available.
Vendor Advisoryaccess.redhat.comMay 28, 2026, 7:16 PM - https://security.openstack.org/ossa/OSSA-2026-015.htmlsecurity.openstack.org
No excerpt available.
Vendor Advisorysecurity.openstack.orgMay 28, 2026, 7:16 PM - https://bugs.launchpad.net/keystone/+bug/2148477bugs.launchpad.net
No excerpt available.
Exploitbugs.launchpad.netMay 28, 2026, 7:16 PM
Exploit code
Public exploit repository references
Public PoC repositories are third-party, potentially unsafe artifacts. Treat their code as untrusted and use it only on authorized systems in an isolated, least-privilege environment. cvebuzz does not execute the code or verify that an exploit works.
0 repository references · best confidence N/A · max 0 stars
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