Copyparty: file/dirkey confusion

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-70657
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-18 15:17:01 UTC
Updated2026-08-18 18:19:32 UTC
DescriptionCopyparty 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.

Risk And Classification

Primary CVSS: v3.1 4.3 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

EPSS: 0.003170000 probability, percentile 0.245770000 (date 2026-08-19)

Problem Types: CWE-863 | CWE-863 CWE-863: Incorrect Authorization

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary4.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
3.1CNADECLARED4.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA 9001 Copyparty affected < 1.20.17 Not specified

References

ReferenceSourceLinkTags
github.com/9001/copyparty/releases/tag/v1.20.17 [email protected] github.com
github.com/9001/copyparty/security/advisories/GHSA-x5pq-m9p8-f4vx [email protected] github.com
github.com/9001/copyparty/commit/e40755331ba9449993ff482456e6bdd2c6deb950 [email protected] github.com
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