File owners were unable to unlock TYPE_TOKEN locks placed by other users, leaving files permanently locked with no recovery path outside of the database.

Metrics

No CVSS v4.0

No CVSS v3.1

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Affected Vendors & Products

No data.

No data.

No data.

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No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://hackerone.com/reports/3770482 cve-icon cve-icon
History

Mon, 21 Sep 2026 16:45:00 +0000

Type Values Removed Values Added
Title Permanent File Locks due to Improper Access Control in Nextcloud Server

Mon, 21 Sep 2026 15:30:00 +0000

Type Values Removed Values Added
Description File owners were unable to unlock TYPE_TOKEN locks placed by other users, leaving files permanently locked with no recovery path outside of the database.
Weaknesses CWE-284
References
Metrics cvssV3_0

{'score': 6.5, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: hackerone

Published:

Updated: 2026-09-21T15:25:33.553Z

Reserved: 2026-08-20T15:00:00.606Z

Link: CVE-2026-77165

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-09-21T16:17:23.863

Modified: 2026-09-21T16:17:23.863

Link: CVE-2026-77165

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-21T16:30:11Z

Weaknesses