CVE-2026-45275 MEDIUM

CVE-2026-45275: Nextcloud: Authorization bypass in approval feature allows unauthorized file sharing with approvers

Vendor Nextcloud
Product security-advisories
Weakness CWE-285
Published June 1, 2026
Last update June 1, 2026

CVSS base score

6.5/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality High
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

What the vulnerability does

01Description

Nextcloud is an open source content collaboration platform. Prior to version 2.7.2, a privilege escalation vulnerability exists in the Approval app that allows a user without sharing permissions to force the system to share a file with approvers. This results in an authorization bypass and privilege escalation, allowing unauthorized distribution of restricted files. This issue has been patched in version 2.7.2.

Key dates

02Disclosure timeline

June 1, 2026 CVE published
June 1, 2026 Record updated