CVE-2026-54917

SeaweedFS is a distributed storage system for object storage (S3), file systems, and Iceberg tables. Prior to 4.30, the S3 API gateway and the Iceberg REST catalog gateway construct their routers with mux.NewRouter().SkipClean(true). With path cleaning disabled, a .. segment inside the URL survives routing, so a request such as `GET /bucket-A/../evil-bucket/key`, is matched as bucket=bucket-A, object=../evil-bucket/key. The captured object key is then joined into a filer path with util.JoinPath (S3) / path.Join (Iceberg), which collapse the .. server-side, so the actual read or write lands in evil-bucket. This vulnerability is fixed in 4.30.

• CWE-22

• https://github.com/seaweedfs/seaweedfs/pull/9687Issue Tracking, Mitigation
• https://github.com/seaweedfs/seaweedfs/security/advisories/GHSA-w62w-66v9-vvgvExploit, Patch, Vendor Advisory
• https://github.com/seaweedfs/seaweedfs/security/advisories/GHSA-w62w-66v9-vvgvExploit, Patch, Vendor Advisory

Published

Jun 25, 2026

Last Modified

Jun 29, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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