Path Traversal in Seaweedfs
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.
Vulnerability class: Path Traversal (Directory Traversal)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.016 (75.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 75th percentile — 75.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.012 · newest: 0.016 · change: +0.004
Affected products
- Seaweedfs — versions < 4.30
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/seaweedfs/seaweedfs/security/advisories/GHSA-w62w-66v9-vvgv (Exploit, Patch, Vendor Advisory)
- github.com/seaweedfs/seaweedfs/pull/9687 (Mitigation, Issue Tracking)
Frequently asked questions
- What is CVE-2026-54917?
- CVE-2026-54917 is a critical-severity vulnerability in Seaweedfs, classified under Path Traversal. CVSS score: 10.0/10. Published 2026-06-25.
- How severe is CVE-2026-54917?
- Critical severity. CVSS v3 base score is 10.0 out of 10.
- Is CVE-2026-54917 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.