Vulnerability · Published Aug 11, 2026 · Assigned by GitHub_M

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

Critical 9.8

In plain English

A critical-severity missing authentication in seaweedfs from seaweedfs. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 56% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)9.8Critical

Exploit odds (30 days)0.8%top 43.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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 packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Go	github.com/seaweedfs/seaweedfs	0.0.0-20260512171108-5e8f99f40a8a	GHSA-2v6v-25fm-p4fg
Go	github.com/seaweedfs/seaweedfs	0.0.0-20260512171108-5e8f99f40a8a	GO-2026-6351

Affected products (as reported)

Vendor	Product	Versions
seaweedfs	seaweedfs	< 4.24

Weakness: CWE-306 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

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