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.
{
"cna_assigner": "GitHub_M",
"cwe_ids": [
"CWE-22"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55874.json"
}{
"extracted_events": [
{
"range": [
{
"introduced": "0"
},
{
"fixed": "4.34"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"range": [
{
"fixed": "b44cf51fe931bd75aa4d37ae766bea90d7f85ccd"
}
],
"source": "REFERENCES_COMMIT"
},
{
"original_tag": "4.34",
"range": [
{
"fixed": "c6cf5a5bd7c87694c8d71ab41571f1412170ab2a"
}
],
"source": "REFERENCES_TAG"
}
]
}