Critical
SeaweedFS: Unauthenticated filer IAM gRPC service grants S3 administrative control
Type: advisorySources: OSV
SeaweedFS is a distributed storage system. Prior to 4.24, the filer registers the SeaweedIdentityAccessManagement gRPC service without mandatory authentication when jwt.filer_signing.key is unset, allowing any client that can reach the filer gRPC port to invoke CreateUser, CreateAccessKey, PutPolicy, and related IAM RPCs to mint credentials and gain S3 administrative control. This issue is fixed in versions 4.24.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-72920
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 3 Nov 2026, 16:12 UTC · Revision 1
Source evidence
SeaweedFS: Unauthenticated filer IAM gRPC service grants S3 administrative control
core-osv · Original sourcePublished 11 Aug 2026, 14:23 UTC
SeaweedFS is a distributed storage system. Prior to 4.24, the filer registers the SeaweedIdentityAccessManagement gRPC service without mandatory authentication when jwt.filer_signing.key is unset, allowing any client that can reach the filer gRPC port to invoke CreateUser, CreateAccessKey, PutPolicy, and related IAM RPCs to mint credentials and gain S3 administrative control. This issue is fixed in versions 4.24.
osv:CVE-2026-72920
Complete source record
{
"id": "a53283d033d51170cf612b112aed34d7cc453a5a6e2bfa0c4f0bfa20ecc4ba7f",
"url": "https://osv.dev/vulnerability/CVE-2026-72920",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "SeaweedFS: Unauthenticated filer IAM gRPC service grants S3 administrative control",
"summary": "SeaweedFS is a distributed storage system. Prior to 4.24, the filer registers the SeaweedIdentityAccessManagement gRPC service without mandatory authentication when jwt.filer_signing.key is unset, allowing any client that can reach the filer gRPC port to invoke CreateUser, CreateAccessKey, PutPolicy, and related IAM RPCs to mint credentials and gain S3 administrative control. This issue is fixed in versions 4.24.",
"evidence": "osv:CVE-2026-72920",
"products": [],
"severity": "critical",
"structured": {
"id": "CVE-2026-72920",
"aliases": [
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"CVE-2026-72920",
"GHSA-2v6v-25fm-p4fg",
"GO-2026-6351"
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"metrics": [
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"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72920.json"
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],
"modified": "2026-10-28T02:30:30.100680437Z",
"provider": "osv",
"references": [
"https://github.com/seaweedfs/seaweedfs/releases/tag/4.24",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72920.json",
"https://github.com/seaweedfs/seaweedfs/security/advisories/GHSA-2v6v-25fm-p4fg",
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"https://github.com/seaweedfs/seaweedfs/pull/9442"
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},
"source_id": "core-osv",
"document_id": 497181,
"published_at": "2026-08-11T14:23:22.425+00:00"
}