CVE-2026-55874

EUVD-2026-42285
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.
Path Traversal
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
GitHub_MCNA
7.7 HIGH
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
seaweedfsseaweedfs
𝑥
< 4.34
CNA
Common Weakness Enumeration
References
https://github.com/seaweedfs/seaweedfs/commit/b44cf51fe931bd75aa4d37ae766bea90d7f85ccd
https://github.com/seaweedfs/seaweedfs/pull/9929
https://github.com/seaweedfs/seaweedfs/releases/tag/4.34
https://github.com/seaweedfs/seaweedfs/security/advisories/GHSA-56wq-x3wv-3ff4