keystone — security advisory
An issue was discovered in OpenStack Keystone before 29.0.2. The Keystone RBAC policy enforcer in enforce_call unconditionally merges the raw JSON request body into the policy enforcement dictionary via policy_dict.update(json_input.copy()), overwriting trusted target data that was previously set from database lookups. Because flask.request.get_json is called with force=True, this works regardless of Content-Type or HTTP method. Any authenticated user can inject arbitrary policy target attributes (e.g., user_id, project_id) into the request body to bypass RBAC checks and perform unauthorized operations on resources belonging to other users or projects. This was introduced in commit 5ea59f52 (Rocky/14.0.0).
- Products
- keystone
- Affected versions
- 2:22.0.0-2, 2:22.0.2-0+deb12u1, 2:22.0.2-0+deb12u2, 2:27.0.0-3, 2:27.0.0-3+deb13u1, 2:27.0.0-3+deb13u3, 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
- Fixed versions
- 2:22.0.2-0+deb12u3, 2:27.0.0-3+deb13u4, 2:29.0.1-2
- CVEs
- CVE-2026-42999
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 17:38 UTC · Revision 2
Source evidence
An issue was discovered in OpenStack Keystone before 29.0.2. The Keystone RBAC policy enforcer in enforce_call unconditionally merges the raw JSON request body into the policy enforcement dictionary via policy_dict.update(json_input.copy()), overwriting trusted target data that was previously set from database lookups. Because flask.request.get_json is called with force=True, this works regardless of Content-Type or HTTP method. Any authenticated user can inject arbitrary policy target attributes (e.g., user_id, project_id) into the request body to bypass RBAC checks and perform unauthorized operations on resources belonging to other users or projects. This was introduced in commit 5ea59f52 (Rocky/14.0.0).
osv:DEBIAN-CVE-2026-42999
keystone
Fixed versions: 2:22.0.2-0+deb12u3
keystone
Fixed versions: 2:27.0.0-3+deb13u4
keystone
Fixed versions: 2:29.0.1-2
Complete source record
{
"id": "69cc16607ce86f2acddd99b9876ab3ad5516c75bfd13b74c8b854cd25f12c479",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-42999",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2026-42999",
"summary": "An issue was discovered in OpenStack Keystone before 29.0.2. The Keystone RBAC policy enforcer in enforce_call unconditionally merges the raw JSON request body into the policy enforcement dictionary via policy_dict.update(json_input.copy()), overwriting trusted target data that was previously set from database lookups. Because flask.request.get_json is called with force=True, this works regardless of Content-Type or HTTP method. Any authenticated user can inject arbitrary policy target attributes (e.g., user_id, project_id) into the request body to bypass RBAC checks and perform unauthorized operations on resources belonging to other users or projects. This was introduced in commit 5ea59f52 (Rocky/14.0.0).",
"evidence": "osv:DEBIAN-CVE-2026-42999",
"products": [
{
"name": {
"value": "keystone",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2:22.0.2-0+deb12u3",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": [
{
"value": "2:22.0.0-2",
"evidence": "/affected/0/versions"
},
{
"value": "2:22.0.2-0+deb12u1",
"evidence": "/affected/0/versions"
},
{
"value": "2:22.0.2-0+deb12u2",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "keystone",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2:27.0.0-3+deb13u4",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": [
{
"value": "2:27.0.0-3",
"evidence": "/affected/1/versions"
},
{
"value": "2:27.0.0-3+deb13u1",
"evidence": "/affected/1/versions"
},
{
"value": "2:27.0.0-3+deb13u3",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "keystone",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2:29.0.1-2",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": [
{
"value": "2:27.0.0-3",
"evidence": "/affected/2/versions"
},
{
"value": "2:28.0.0-1",
"evidence": "/affected/2/versions"
},
{
"value": "2:28.0.0-2",
"evidence": "/affected/2/versions"
},
{
"value": "2:28.0.0-3",
"evidence": "/affected/2/versions"
},
{
"value": "2:28.0.0-4",
"evidence": "/affected/2/versions"
},
{
"value": "2:28.0.0-5",
"evidence": "/affected/2/versions"
},
{
"value": "2:28.0.0-6",
"evidence": "/affected/2/versions"
},
{
"value": "2:28.0.0~rc1-1",
"evidence": "/affected/2/versions"
},
{
"value": "2:28.0.0~rc1-2",
"evidence": "/affected/2/versions"
},
{
"value": "2:28.0.0~rc1-4",
"evidence": "/affected/2/versions"
},
{
"value": "2:29.0.0-1",
"evidence": "/affected/2/versions"
},
{
"value": "2:29.0.0-2",
"evidence": "/affected/2/versions"
},
{
"value": "2:29.0.0-3",
"evidence": "/affected/2/versions"
},
{
"value": "2:29.0.0~rc1-1",
"evidence": "/affected/2/versions"
},
{
"value": "2:29.0.0~rc1-2",
"evidence": "/affected/2/versions"
},
{
"value": "2:29.0.1-1",
"evidence": "/affected/2/versions"
}
]
}
],
"severity": "high",
"structured": {
"id": "DEBIAN-CVE-2026-42999",
"aliases": [
"DEBIAN-CVE-2026-42999"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
}
],
"affected": [
{
"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-2026-42999.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-2026-42999.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-2026-42999.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-27T09:47:32.998076022Z",
"provider": "osv",
"upstream": [
"CVE-2026-42999"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2026-42999"
]
},
"related_cves": [
{
"value": "CVE-2026-42999",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 460944,
"published_at": "2026-05-28T19:16:37.63+00:00"
}