CVE-2026-55874
HIGH
NVD
CVSS Score
7.7
Severity
HIGH
Published
Jul 08, 2026
Vendor
unknown
Description
SeaweedFS is a distributed storage system. Prior to 4.34, the S3 API gateway does not reject dot-dot path segments in the X-Amz-Copy-Source header used by CopyObject and UploadPartCopy, allowing an authenticated identity scoped to one bucket to read objects from other buckets through server-side copy. This issue is fixed in version 4.34.