Critical
Helm impersonation bypass of `RESTClientGetter` retains `cluster-admin` during template rendering
Type: advisorySources: OSV
Fleet's Helm deployer did not fully apply ServiceAccount impersonation in two code paths, allowing a tenant with git push access to a Fleet-monitored repository to read secrets from any namespace on every downstream cluster targeted by their `GitRepo`.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-41050
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 4 Nov 2026, 02:24 UTC · Revision 1
Source evidence
Helm impersonation bypass of `RESTClientGetter` retains `cluster-admin` during template rendering
core-osv · Original sourcePublished 13 May 2026, 08:04 UTC
Fleet's Helm deployer did not fully apply ServiceAccount impersonation in two code paths, allowing a tenant with git push access to a Fleet-monitored repository to read secrets from any namespace on every downstream cluster targeted by their `GitRepo`.
osv:CVE-2026-41050
Complete source record
{
"id": "1ba335524e2957e32c9f47d9269e89dc6e22d647240b0bba1017b44128334bea",
"url": "https://osv.dev/vulnerability/CVE-2026-41050",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Helm impersonation bypass of `RESTClientGetter` retains `cluster-admin` during template rendering",
"summary": "Fleet's Helm deployer did not fully apply ServiceAccount impersonation in two code paths, allowing a tenant with git push access to a Fleet-monitored repository to read secrets from any namespace on every downstream cluster targeted by their `GitRepo`.",
"evidence": "osv:CVE-2026-41050",
"products": [],
"severity": "critical",
"structured": {
"id": "CVE-2026-41050",
"aliases": [
"CVE-2026-41050",
"GHSA-765j-qfrp-hm3j",
"GO-2026-5207"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/rancher/fleet",
"type": "GIT",
"events": [
{
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},
{
"fixed": "978ddfd96082e35190fff4b23d6af643ca158dda"
},
{
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{
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{
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{
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{
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{
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}
],
"database_specific": {
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"range": [
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{
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{
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{
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{
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],
"source": "CPE_RANGE"
},
{
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{
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"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:suse:rancher_fleet:*:*:*:*:*:*:*:*",
"range": [
{
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{
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}
]
}
}
],
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"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-41050.json"
}
}
],
"modified": "2026-10-28T02:30:32.380494297Z",
"provider": "osv",
"references": [
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/41xxx/CVE-2026-41050.json",
"https://github.com/advisories/GHSA-765j-qfrp-hm3j",
"https://nvd.nist.gov/vuln/detail/CVE-2026-41050",
"https://bugzilla.suse.com/show_bug.cgi?id=CVE-2026-41050"
],
"provider_metadata": {
"cwe_ids": [
"CWE-863"
],
"cna_assigner": "suse",
"unresolved_ranges": [
{
"extracted_events": [
{
"range": [
{
"introduced": "0.15.0"
},
{
"fixed": "0.15.1"
},
{
"introduced": "0.14.0"
},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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}
],
"source": "AFFECTED_FIELD",
"strategy": "StandardRange"
}
]
}
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/41xxx/CVE-2026-41050.json"
}
},
"related_cves": [
{
"value": "CVE-2026-41050",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 499638,
"published_at": "2026-05-13T08:04:57.293+00:00"
}