Description
Nextcloud is an open source content collaboration platform. From versions 1.15.0 to before 1.15.4, 1.16.0 to before 1.16.3, 1.17.0 to before 1.17.1, and 1.18.0 to before 1.18.1, a malicious user with access to an end-to-end encrypted files drop link was able to also drop files into other end-to-end encrypted folders of the share owner. Reading and modifying of other files was not possible. This issue has been patched in versions 1.15.4, 1.16.3, 1.17.1, 1.18.1, and 2.0.0-rc.7.
Published: 2026-06-01
Score: 3.5 Low
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Wed, 03 Jun 2026 02:30:00 +0000

Type Values Removed Values Added
First Time appeared Nextcloud
Nextcloud end To End Encryption
Vendors & Products Nextcloud
Nextcloud end To End Encryption

Mon, 01 Jun 2026 20:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 01 Jun 2026 17:00:00 +0000

Type Values Removed Values Added
Description Nextcloud is an open source content collaboration platform. From versions 1.15.0 to before 1.15.4, 1.16.0 to before 1.16.3, 1.17.0 to before 1.17.1, and 1.18.0 to before 1.18.1, a malicious user with access to an end-to-end encrypted files drop link was able to also drop files into other end-to-end encrypted folders of the share owner. Reading and modifying of other files was not possible. This issue has been patched in versions 1.15.4, 1.16.3, 1.17.1, 1.18.1, and 2.0.0-rc.7.
Title Nextcloud: Files drop share links for end-to-end encrypted folders allowed to drop files into other folders of the share owner
Weaknesses CWE-639
References
Metrics cvssV3_1

{'score': 3.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N'}


Subscriptions

Nextcloud End To End Encryption
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-06-01T19:30:25.192Z

Reserved: 2026-05-08T20:44:38.965Z

Link: CVE-2026-45159

cve-icon Vulnrichment

Updated: 2026-06-01T19:30:20.748Z

cve-icon NVD

Status : Deferred

Published: 2026-06-01T17:17:09.550

Modified: 2026-06-01T18:14:29.087

Link: CVE-2026-45159

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-06-02T20:54:02Z

Weaknesses