{"id":"CVE-2026-55874","aliases":["BIT-seaweedfs-2026-55874","GHSA-56wq-x3wv-3ff4"],"url":"https://o3.security/vulnerability/CVE-2026-55874","summary":"SeaweedFS: Path traversal in the S3 gateway X-Amz-Copy-Source header allows cross-bucket object read","details":"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":"2026-07-08T14:43:40.155Z","modified":"2026-08-12T03:51:43.639917103Z","cvss":{"score":7.7,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Go","name":"github.com/seaweedfs/seaweedfs","fixedVersion":"0.0.0-20260612000715-b44cf51fe931"}],"fix":{"url":"https://github.com/seaweedfs/seaweedfs/commit/b44cf51fe931bd75aa4d37ae766bea90d7f85ccd","label":"seaweedfs/seaweedfs@b44cf51"},"references":[{"type":"WEB","url":"https://github.com/seaweedfs/seaweedfs/releases/tag/4.34"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55874.json"},{"type":"ADVISORY","url":"https://github.com/seaweedfs/seaweedfs/security/advisories/GHSA-56wq-x3wv-3ff4"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55874"},{"type":"FIX","url":"https://github.com/seaweedfs/seaweedfs/commit/b44cf51fe931bd75aa4d37ae766bea90d7f85ccd"},{"type":"FIX","url":"https://github.com/seaweedfs/seaweedfs/pull/9929"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:43.639917103Z"}}