Critical severity10.0NVD Advisory· Published Jun 25, 2026· Updated Jun 29, 2026
CVE-2026-54917
CVE-2026-54917
Description
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.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
github.com/seaweedfs/seaweedfsGo | < 0.0.0-20260526080459-dd1b4287899e | 0.0.0-20260526080459-dd1b4287899e |
Affected products
4- osv-coords2 versions
< 4.30.0+ 1 more
- (no CPE)range: < 4.30.0
- (no CPE)range: < 0.0.20260827T195228-160000.1.1
Patches
Vulnerability mechanics
References
5- github.com/seaweedfs/seaweedfs/security/advisories/GHSA-w62w-66v9-vvgvnvdExploitPatchVendor AdvisoryWEB
- github.com/advisories/GHSA-w62w-66v9-vvgvghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-54917ghsaADVISORY
- github.com/seaweedfs/seaweedfs/commit/dd1b4287899eed3dfd73c2f3b1de001996fda229ghsaWEB
- github.com/seaweedfs/seaweedfs/pull/9687nvdIssue TrackingMitigationWEB
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