High
Rancher: Ownership-less ClusterRole overwrite via attacker-controlled cr-name annotation on GlobalRole
Type: advisorySources: OSV
A flaw was found in Rancher Manager. The GlobalRole controller derived the target ClusterRole name from the user-settable `authz.management.cattle.io/cr-name` annotation and overwrote that object's rules without verifying ownership. A user with delegated GlobalRole create or update permission could point the annotation at any existing ClusterRole, such as `cluster-admin`, and revoke the permissions of every principal bound to it. The change persists after the malicious GlobalRole is deleted. This issue affects Rancher: before 2.15.1.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-71404
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 3 Nov 2026, 06:11 UTC · Revision 1
Source evidence
Rancher: Ownership-less ClusterRole overwrite via attacker-controlled cr-name annotation on GlobalRole
core-osv · Original sourcePublished 3 Sept 2026, 14:51 UTC
A flaw was found in Rancher Manager. The GlobalRole controller derived the target ClusterRole name from the user-settable `authz.management.cattle.io/cr-name` annotation and overwrote that object's rules without verifying ownership. A user with delegated GlobalRole create or update permission could point the annotation at any existing ClusterRole, such as `cluster-admin`, and revoke the permissions of every principal bound to it. The change persists after the malicious GlobalRole is deleted. This issue affects Rancher: before 2.15.1.
osv:CVE-2026-71404
Complete source record
{
"id": "a580a087e9c245fbe6f6418e3fce690d482cfd6654741af603401d3855e1e4df",
"url": "https://osv.dev/vulnerability/CVE-2026-71404",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Rancher: Ownership-less ClusterRole overwrite via attacker-controlled cr-name annotation on GlobalRole",
"summary": "A flaw was found in Rancher Manager. The GlobalRole controller derived the target ClusterRole name from the user-settable `authz.management.cattle.io/cr-name` annotation and overwrote that object's rules without verifying ownership. A user with delegated GlobalRole create or update permission could point the annotation at any existing ClusterRole, such as `cluster-admin`, and revoke the permissions of every principal bound to it. The change persists after the malicious GlobalRole is deleted. This issue affects Rancher: before 2.15.1.",
"evidence": "osv:CVE-2026-71404",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2026-71404",
"aliases": [
"CVE-2026-71404"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/rancher/rancher",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "8c257d748d23d4812092e28cc92b2a6f3e4dd594"
}
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"database_specific": {
"extracted_events": [
{
"range": [
{
"introduced": "0"
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{
"fixed": "2.15.1"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandardRange"
},
{
"cpe": "cpe:2.3:a:suse:rancher:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
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{
"fixed": "2.15.1"
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"source": "CPE_RANGE"
}
]
}
}
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],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-71404.json"
}
}
],
"modified": "2026-10-28T02:30:26.280335186Z",
"provider": "osv",
"references": [
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71404.json",
"https://nvd.nist.gov/vuln/detail/CVE-2026-71404",
"https://github.com/rancher/rancher/pull/56593",
"https://github.com/rancher/rancher/pull/56642",
"https://github.com/rancher/rancher"
],
"provider_metadata": {
"cwe_ids": [
"CWE-639"
],
"cna_assigner": "suse",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71404.json"
}
},
"related_cves": [
{
"value": "CVE-2026-71404",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 492951,
"published_at": "2026-09-03T14:51:44.678+00:00"
}