Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Nextcloud | Forms | >= 4.3.0, < 5.2.7 |
Related Weaknesses (CWE)
References
- https://github.com/nextcloud/forms/pull/3291Issue TrackingPatch
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-q4fw-6MitigationVendor Advisory
- https://hackerone.com/reports/3617352Permissions Required
FAQ
What is CVE-2026-45543?
CVE-2026-45543 is a vulnerability with a CVSS score of 5.3 (MEDIUM). 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 aff...
How severe is CVE-2026-45543?
CVE-2026-45543 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-45543?
Check the references section above for vendor advisories and patch information. Affected products include: Nextcloud Forms.