What’s Vulnerable › Vulnerabilities

CVE-2026-72920: SeaweedFS: Unauthenticated filer IAM gRPC service grants S3 administrative control

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-11 · updated 2026-09-09
• Weakness: CWE-306

Description

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.

Affected products

• seaweedfs: before 4.24

References

• https://github.com/seaweedfs/seaweedfs/commit/5e8f99f40a8abc7b449aefd260516443377041c7
• https://github.com/seaweedfs/seaweedfs/pull/9442
• https://github.com/seaweedfs/seaweedfs/releases/tag/4.24
• https://github.com/seaweedfs/seaweedfs/security/advisories/GHSA-2v6v-25fm-p4fg

Get alerted when CVE-2026-72920 or the next vulnerability affects your stack