DEBIAN-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.
DEBIAN-CVE-2026-43000
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:DEBIAN-CVE-2026-43000
keystone
Source reference: /affected/0/package/name
- Affected versions
- 2:22.0.0-2
Source reference:
/affected/0/versions2:22.0.2-0+deb12u1Source reference:
/affected/0/versions2:22.0.2-0+deb12u2Source reference:
/affected/0/versions - Fixed versions
- 2:22.0.2-0+deb12u3
Source reference:
/affected/0/ranges - Prerequisites
- Not stated in this record
keystone
Source reference: /affected/1/package/name
- Affected versions
- 2:27.0.0-3
Source reference:
/affected/1/versions2:27.0.0-3+deb13u1Source reference:
/affected/1/versions2:27.0.0-3+deb13u3Source reference:
/affected/1/versions - Fixed versions
- 2:27.0.0-3+deb13u4
Source reference:
/affected/1/ranges - Prerequisites
- Not stated in this record
keystone
Source reference: /affected/2/package/name
- Affected versions
- 2:27.0.0-3
Source reference:
/affected/2/versions2:28.0.0-1Source reference:
/affected/2/versions2:28.0.0-2Source reference:
/affected/2/versions2:28.0.0-3Source reference:
/affected/2/versions2:28.0.0-4Source reference:
/affected/2/versions2:28.0.0-5Source reference:
/affected/2/versions2:28.0.0-6Source reference:
/affected/2/versions2:28.0.0~rc1-1Source reference:
/affected/2/versions2:28.0.0~rc1-2Source reference:
/affected/2/versions2:28.0.0~rc1-4Source reference:
/affected/2/versions2:29.0.0-1Source reference:
/affected/2/versions2:29.0.0-2Source reference:
/affected/2/versions2:29.0.0-3Source reference:
/affected/2/versions2:29.0.0~rc1-1Source reference:
/affected/2/versions2:29.0.0~rc1-2Source reference:
/affected/2/versions2:29.0.1-1Source reference:
/affected/2/versions - Fixed versions
- 2:29.0.1-2
Source reference:
/affected/2/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2:22.0.2-0+deb12u3"
}
]
}
],
"package": {
"name": "keystone",
"purl": "pkg:deb/debian/keystone?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"2:22.0.0-2",
"2:22.0.2-0+deb12u1",
"2:22.0.2-0+deb12u2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-43000.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2:27.0.0-3+deb13u4"
}
]
}
],
"package": {
"name": "keystone",
"purl": "pkg:deb/debian/keystone?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"2:27.0.0-3",
"2:27.0.0-3+deb13u1",
"2:27.0.0-3+deb13u3"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-43000.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2:29.0.1-2"
}
]
}
],
"package": {
"name": "keystone",
"purl": "pkg:deb/debian/keystone?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"2:27.0.0-3",
"2:28.0.0-1",
"2:28.0.0-2",
"2:28.0.0-3",
"2:28.0.0-4",
"2:28.0.0-5",
"2:28.0.0-6",
"2:28.0.0~rc1-1",
"2:28.0.0~rc1-2",
"2:28.0.0~rc1-4",
"2:29.0.0-1",
"2:29.0.0-2",
"2:29.0.0-3",
"2:29.0.0~rc1-1",
"2:29.0.0~rc1-2",
"2:29.0.1-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-43000.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #56981 · Revision 1
- Added to Heist Feed
- Publisher date