CVE-2026-82984

Authenticated Non-Members Can Enumerate Team Resources via API in Nextcloud Server

Published Oct 27, 2026 CVSS 3.0 · 4.3 Medium EPSS < 1% KEV · Not listed
Description
When a team was configured as "visible to everyone", the web UI correctly blocked non-members from viewing the team ("You are not a member of ..."), but the resources API endpoint could still be called directly, allowing any authenticated non-member to enumerate the team's internal resources and their identifiers.

This does not grant access to the contents of the discovered resources themselves, only their existence, names, and identifiers.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
References
History
Type Values Removed Values Added
Metrics ssvc

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

Type Values Removed Values Added
First Time appeared Nextcloud
Nextcloud server
Vendors & Products Nextcloud
Nextcloud server
Type Values Removed Values Added
Title Authenticated Non-Members Can Enumerate Team Resources via API in Nextcloud Server
Type Values Removed Values Added
Description When a team was configured as "visible to everyone", the web UI correctly blocked non-members from viewing the team ("You are not a member of ..."), but the resources API endpoint could still be called directly, allowing any authenticated non-member to enumerate the team's internal resources and their identifiers. This does not grant access to the contents of the discovered resources themselves, only their existence, names, and identifiers.
Weaknesses CWE-284
References
Metrics cvssV3_0

{'score': 4.3, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
hackerone
Published
Updated
Nov 4, 2026, 8:25 PM
Reserved
Aug 31, 2026, 3:00 PM
Status
Awaiting Analysis
Published
Oct 27, 2026, 5:17 PM
Modified
Nov 4, 2026, 9:18 PM