CVE-2026-55874

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.

Score

CVSS 3.1 7.7 High

Status

Deferred - security-advisories@github.com

Published

2026-07-08

Last modified

2026-07-08

Weaknesses

CWE-22

Affected products

• Seaweedfs (Seaweedfs)

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