Medium
Copyparty: file/dirkey confusion
Type: advisorySources: OSV
Copyparty is a portable file server. Prior to 1.20.17, copyparty volumes with the dk or dks directory-key flag combined with the fk or fka file-key flag can convert a valid file key into a directory key, granting read access to the containing folder. This vulnerability was only reachable if both types of keys (filekeys and dirkeys) were manually enabled in the volume flags simultaneously. This issue is fixed in version 1.20.17.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-70657
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 4 Nov 2026, 15:55 UTC · Revision 1
Source evidence
Copyparty is a portable file server. Prior to 1.20.17, copyparty volumes with the dk or dks directory-key flag combined with the fk or fka file-key flag can convert a valid file key into a directory key, granting read access to the containing folder. This vulnerability was only reachable if both types of keys (filekeys and dirkeys) were manually enabled in the volume flags simultaneously. This issue is fixed in version 1.20.17.
osv:CVE-2026-70657
Complete source record
{
"id": "d4efd2ed96c4cc6cdef467db84a6f2688e48fec8f9c620844ad33086502b4a11",
"url": "https://osv.dev/vulnerability/CVE-2026-70657",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Copyparty: file/dirkey confusion",
"summary": "Copyparty is a portable file server. Prior to 1.20.17, copyparty volumes with the dk or dks directory-key flag combined with the fk or fka file-key flag can convert a valid file key into a directory key, granting read access to the containing folder. This vulnerability was only reachable if both types of keys (filekeys and dirkeys) were manually enabled in the volume flags simultaneously. This issue is fixed in version 1.20.17.",
"evidence": "osv:CVE-2026-70657",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2026-70657",
"aliases": [
"CVE-2026-70657",
"GHSA-x5pq-m9p8-f4vx",
"PYSEC-2026-3660"
],
"metrics": [
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"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"
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"affected": [
{
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"modified": "2026-10-28T02:30:36.808701985Z",
"provider": "osv",
"references": [
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"https://github.com/9001/copyparty/security/advisories/GHSA-x5pq-m9p8-f4vx",
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"provider_metadata": {
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"evidence": "/id"
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},
"source_id": "core-osv",
"document_id": 504337,
"published_at": "2026-08-18T14:59:54.218+00:00"
}