5.3Medium
CVE-2026-45543Nextcloud: Deleting a Forms collaborator share leaves uploaded response files accessible through a lingering Files share
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.
Weakness (CWE):
CWE-552
Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.
Affected products and versions
| Vendor | Product | Versions | |
|---|---|---|---|
| nextcloud | forms | 4.3.0 – < 5.2.7 | |
| nextcloud | security-advisories | >= 4.3.0, < 5.2.7 |
References and patches
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-q4fw-6jf8-5vhh MitigationVendor Advisory
- https://github.com/nextcloud/forms/pull/3291 Issue TrackingPatch
- https://hackerone.com/reports/3617352
CPE matches (NVD) (1)
cpe:2.3:a:nextcloud:forms:*:*:*:*:*:*:*:*≥ 4.3.0 < 5.2.7