What is CVE-2026-77169?

CVE-2026-77169 is a medium-severity vulnerability in Nextcloud Team Folders, classified under Improper Access Control. CVSS score: 6.5/10. Published 2026-09-18.

How severe is CVE-2026-77169?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Nextcloud Team Folders

CVE-2026-77169

A vulnerability in the team folders (formerly group folders) app when used in combination with the workspace app allowed API/REST-only delegated administrators to bypass folder-level authorization controls. The workspace app enables organizations to delegate limited administrative privileges for team folder management via API/REST only, restricting access to folders for which the admin has advanced permissions.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N.

Affected products

Nextcloud Team Folders

Weakness classification (CWE)

CWE-284 — Improper Access Control

References

support@hackerone.com

Frequently asked questions

What is CVE-2026-77169?: CVE-2026-77169 is a medium-severity vulnerability in Nextcloud Team Folders, classified under Improper Access Control. CVSS score: 6.5/10. Published 2026-09-18.
How severe is CVE-2026-77169?: Medium severity. CVSS v3 base score is 6.5 out of 10.