Gardener: Authorization Bypass via Group Subject Injection
Gardener implements the automated management and operation of Kubernetes clusters as a service. Prior to 1.142.6, 1.143.3, 1.144.2, and 1.145.0, the customverbauthorizer admission plugin's mustCheckProjectMembers manage-members check compares changes to User subjects but does not account for Group or ServiceAccount subjects in Project.spec.members. A project administrator who lacks manage-members permission can add arbitrary Group or ServiceAccount subjects, including the system:authenticated Group, and thereby grant broad project access. The resulting access can include Shoots, Secrets, and cloud provider credentials. This issue is fixed in versions 1.142.6, 1.143.3, 1.144.2, and 1.145.0.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-79767
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 5 Nov 2026, 03:52 UTC · Revision 1
Source evidence
Gardener: Authorization Bypass via Group Subject Injection
core-osv · Original sourcePublished 22 Sept 2026, 19:58 UTC
Gardener implements the automated management and operation of Kubernetes clusters as a service. Prior to 1.142.6, 1.143.3, 1.144.2, and 1.145.0, the customverbauthorizer admission plugin's mustCheckProjectMembers manage-members check compares changes to User subjects but does not account for Group or ServiceAccount subjects in Project.spec.members. A project administrator who lacks manage-members permission can add arbitrary Group or ServiceAccount subjects, including the system:authenticated Group, and thereby grant broad project access. The resulting access can include Shoots, Secrets, and cloud provider credentials. This issue is fixed in versions 1.142.6, 1.143.3, 1.144.2, and 1.145.0.
osv:CVE-2026-79767
Complete source record
{
"id": "a4a97f0d311f633a4ad8ae86519eac4dcd94029f5d7e28204c6bc0fe3a54c6cd",
"url": "https://osv.dev/vulnerability/CVE-2026-79767",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Gardener: Authorization Bypass via Group Subject Injection",
"summary": "Gardener implements the automated management and operation of Kubernetes clusters as a service. Prior to 1.142.6, 1.143.3, 1.144.2, and 1.145.0, the customverbauthorizer admission plugin's mustCheckProjectMembers manage-members check compares changes to User subjects but does not account for Group or ServiceAccount subjects in Project.spec.members. A project administrator who lacks manage-members permission can add arbitrary Group or ServiceAccount subjects, including the system:authenticated Group, and thereby grant broad project access. The resulting access can include Shoots, Secrets, and cloud provider credentials. This issue is fixed in versions 1.142.6, 1.143.3, 1.144.2, and 1.145.0.",
"evidence": "osv:CVE-2026-79767",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2026-79767",
"aliases": [
"CVE-2026-79767",
"GHSA-gfjv-gqf2-c888",
"GO-2026-6568"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/gardener/gardener",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "a08f4bdb8a4493c08e6f9daa68f5ae63e86919f7"
},
{
"introduced": "94a9a9b336f8fb405e43a5059e2faf5bc99751c1"
},
{
"fixed": "76510c1dd92bbff48e72d05ee291a0f0fd2f986a"
},
{
"introduced": "294cdc82ff08930c750343e30b19dfd3c049d536"
},
{
"fixed": "c4521180a208e4c2d798fac6071b6a157c3ed13f"
},
{
"fixed": "63751db97dca6cc5ee5f966d4963415de6ae5545"
}
],
"database_specific": {
"extracted_events": [
{
"range": [
{
"introduced": "0"
},
{
"fixed": "1.142.6"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"range": [
{
"introduced": "1.143.0"
},
{
"fixed": "1.143.3"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"range": [
{
"introduced": "1.144.0"
},
{
"fixed": "1.144.2"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"range": [
{
"fixed": "63751db97dca6cc5ee5f966d4963415de6ae5545"
}
],
"source": "REFERENCES_COMMIT"
},
{
"range": [
{
"fixed": "c4521180a208e4c2d798fac6071b6a157c3ed13f"
}
],
"source": "REFERENCES_TAG",
"original_tag": "v1.144.2"
}
]
}
}
],
"versions": [
"v1.142.5",
"pkg/apis/v1.142.5",
"v1.143.2",
"pkg/apis/v1.143.2",
"v1.144.1",
"pkg/apis/v1.144.1",
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"pkg/apis/v1.143.1",
"v1.142.3",
"pkg/apis/v1.142.3",
"v1.143.0",
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"v1.142.2",
"pkg/apis/v1.142.2",
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"0.3.0",
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"0.1.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-79767.json"
}
}
],
"modified": "2026-10-28T02:30:42.082837572Z",
"provider": "osv",
"references": [
"https://github.com/gardener/gardener/releases/tag/v1.144.2",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/79xxx/CVE-2026-79767.json",
"https://github.com/gardener/gardener/security/advisories/GHSA-gfjv-gqf2-c888",
"https://nvd.nist.gov/vuln/detail/CVE-2026-79767",
"https://github.com/gardener/gardener/commit/63751db97dca6cc5ee5f966d4963415de6ae5545",
"https://github.com/gardener/gardener/pull/15080"
],
"provider_metadata": {
"cwe_ids": [
"CWE-863"
],
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/79xxx/CVE-2026-79767.json"
}
},
"related_cves": [
{
"value": "CVE-2026-79767",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 510000,
"published_at": "2026-09-22T19:58:00.09+00:00"
}