CVE-2026-54917CWE-22

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

High · published June 25, 2026

CVSS v4.0
7.8
EPSS
2%
Percentile
76.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
7.8 · HIGH
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N
EPSS
0.01641 · 76.2th percentile
Weakness
CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Published
2026-06-25T18:41Z
EPSS history
Timeline
  • 25 JUN 18:41Z
    SeaweedFS: Path traversal in the S3 and Iceberg REST gateways allows cross-bucket access
    cvelistv5