CVE-2026-82984

EUVD-2026-111126

27.10.2026, 17:17

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.

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
hackerone	CNA	4.3 MEDIUM	NETWORK	LOW	LOW	CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Base Score

CVSS 3.x

EPSS Score

Percentile: Unknown

Early Detection

Affected products identified ahead of NVD analysis through intelligence sources (CNA/ADP records, vendor advisories, Enginsight analysis).

Vendor	Product	Version	Source
nextcloud	nextcloud	32.0.0 ≤ 𝑥 ≤ 33.0.0	CNA

Common Weakness Enumeration

CWE-284 - Improper Access Control
The software does not restrict or incorrectly restricts access to a resource from an unauthorized actor.

Vulnerability Media Exposure

[GERMAN] Nextcloud (Server, Tables, Whiteboard, Files Confidential, Collectives, Richdocuments): Mehrere Schwachstellen
Ein Angreifer kann mehrere Schwachstellen in Nextcloud ausnutzen, um Sicherheitsvorkehrungen zu umgehen, Daten zu manipulieren oder offenzulegen sowie Denial-of-Service-Zustände auszulösen.
Published: 2026-10-26T23:00:00+00:00

References

https://hackerone.com/reports/3511955