CVE-2026-45543 MEDIUM

CVE-2026-45543: Nextcloud: Deleting a Forms collaborator share leaves uploaded response files accessible through a lingering Files share

Vendor Nextcloud
Product security-advisories
Weakness CWE-552 · Files accessible externally
Published June 1, 2026
Last update June 1, 2026
View on NVD All CVEs

CVSS base score

5.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality Low
Integrity None

CVSS vector

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

What the vulnerability does

01Description

Nextcloud is an open source content collaboration platform. From version 4.3.0 to before version 5.2.7, a removed collaborator retains unauthorized read access to uploaded respondent files for the affected form. The scope is limited to uploaded files for forms where that user previously had results access. This issue has been patched in version 5.2.7.

Key dates

02Disclosure timeline

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