CVE-2026-45543

Description

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.

PUBLISHED Reserved 2026-05-12 | Published 2026-06-01 | Updated 2026-06-01 | Assigner GitHub_M

Problem types

CWE-552: Files or Directories Accessible to External Parties

Product status

References

github.com/...sories/security/advisories/GHSA-q4fw-6jf8-5vhh

github.com/nextcloud/forms/pull/3291

hackerone.com/reports/3617352

cve.org (CVE-2026-45543)

nvd.nist.gov (CVE-2026-45543)

Download JSON