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TI-2026-39686 Aliases CVE-2026-54917GHSA-w62w-66v9-vvgv

SeaweedFS: Path traversal in the S3 and Iceberg REST gateways allows cross-bucket access

Priority HIGH 73CWE-22Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
None · None · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.01641 76th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed seaweedfs (seaweedfs): 4.30github.com/seaweedfs/seaweedfs (Go): 0.0.0-20260526080459-dd1b4287899e

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
seaweedfsseaweedfsbefore 4.304.30Patch availableCNA
—github.com/seaweedfs/seaweedfs (Go)before 0.0.0-20260526080459-dd1b4287899e0.0.0-20260526080459-dd1b4287899ePatch availableGHSA-w62w-66v9-vvgv
  • seaweedfs Vendorseaweedfs Affected before 4.30 Fixed in 4.30 Patch available CNA
  • github.com/seaweedfs/seaweedfs (Go) Vendor— Affected before 0.0.0-20260526080459-dd1b4287899e Fixed in 0.0.0-20260526080459-dd1b4287899e Patch available GHSA-w62w-66v9-vvgv

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:seaweedfs:seaweedfs:*:*:*:*:*:*:*:*before 4.30Vulnerableseaweedfs
  • cpe:2.3:a:seaweedfs:seaweedfs:*:*:*:*:*:*:*:* Versions before 4.30 Vulnerable ·seaweedfs

Remediation

  • Fix · CNA seaweedfs (seaweedfs) Fixed in 4.30
  • Fix · GHSA-w62w-66v9-vvgv github.com/seaweedfs/seaweedfs (Go) Fixed in 0.0.0-20260526080459-dd1b4287899e Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-54917
  2. 2026-10-03 Alias added: GHSA-w62w-66v9-vvgv

References

Exploit 1

Advisory 1

Other 3

  • TI-2024-26879 seaweedfs v3.68 was discovered to contain a SQL injection vulnerability via the component… CVSS 3.1MEDIUM 6.5
  • TI-2026-74336 Hard-coded SSH host key in SeaweedFS SFTP Helm chart CVSS 4.0HIGH 7.0

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences