CVE-2026-55874 | THREATINT

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.

PUBLISHED Reserved 2026-06-17 | Published 2026-07-08 | Updated 2026-07-08 | Assigner GitHub_M

HIGH: 7.7CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

Problem types

CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Product status

< 4.34

affected

References

github.com/...weedfs/security/advisories/GHSA-56wq-x3wv-3ff4

github.com/seaweedfs/seaweedfs/pull/9929

github.com/...ommit/b44cf51fe931bd75aa4d37ae766bea90d7f85ccd

github.com/seaweedfs/seaweedfs/releases/tag/4.34

cve.org (CVE-2026-55874)

nvd.nist.gov (CVE-2026-55874)

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