CVE-2026-70657

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.

CVSS v3 4.3 MEDIUM

4.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/9001/copyparty/commit/e40755331ba9449993ff482456e6bdd2c6deb950
https://github.com/9001/copyparty/releases/tag/v1.20.17
https://github.com/9001/copyparty/security/advisories/GHSA-x5pq-m9p8-f4vx

Configurations

No configuration.

History

22 Oct 2026, 22:10

Type	Values Removed	Values Added
Summary		(es) Copyparty es un servidor de archivos portátil. Antes de la versión 1.20.17, los volúmenes de copyparty con la bandera de clave de directorio dk o dks combinada con la bandera de clave de archivo fk o fka pueden convertir una clave de archivo válida en una clave de directorio, otorgando acceso de lectura a la carpeta contenedora. Esta vulnerabilidad solo era accesible si ambos tipos de claves (claves de archivo y claves de directorio) se habilitaban manualmente en las banderas del volumen simultáneamente. Este problema está solucionado en la versión 1.20.17.

Information

Published : 2026-08-18 15:17

Updated : 2026-10-22 22:10

NVD link : CVE-2026-70657

Mitre link : CVE-2026-70657

CVE.ORG link : CVE-2026-70657

JSON object : View

Products Affected

No product.

CWE

CWE-863

Incorrect Authorization

{"id": "CVE-2026-70657", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-70657", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-08-18T18:00:08.102305Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 4.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "LOW"}, "impactScore": 1.4, "exploitabilityScore": 2.8}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "9001", "product": "copyparty", "versions": [{"status": "affected", "version": "< 1.20.17"}]}]}], "published": "2026-08-18T15:17:01.077", "references": [{"url": "https://github.com/9001/copyparty/commit/e40755331ba9449993ff482456e6bdd2c6deb950", "source": "security-advisories@github.com"}, {"url": "https://github.com/9001/copyparty/releases/tag/v1.20.17", "source": "security-advisories@github.com"}, {"url": "https://github.com/9001/copyparty/security/advisories/GHSA-x5pq-m9p8-f4vx", "source": "security-advisories@github.com"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-863"}]}], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "Copyparty es un servidor de archivos port\u00e1til. Antes de la versi\u00f3n 1.20.17, los vol\u00famenes de copyparty con la bandera de clave de directorio dk o dks combinada con la bandera de clave de archivo fk o fka pueden convertir una clave de archivo v\u00e1lida en una clave de directorio, otorgando acceso de lectura a la carpeta contenedora. Esta vulnerabilidad solo era accesible si ambos tipos de claves (claves de archivo y claves de directorio) se habilitaban manualmente en las banderas del volumen simult\u00e1neamente. Este problema est\u00e1 solucionado en la versi\u00f3n 1.20.17."}], "lastModified": "2026-10-22T22:10:00.250", "sourceIdentifier": "security-advisories@github.com"}