CVE-2026-45264 Details
Description
Nextcloud is an open source content collaboration platform. From versions 17.0.0 to before 17.0.15, 18.0.0 to before 18.1.12, 19.0.0 to before 19.1.16, 20.0.0 to before 20.1.11, and 21.0.0 to before 21.0.4, a user with READ and CREATE permission, but no UPDATE permission for a team folder can rename files in the team folder. This issue has been patched in versions 17.0.15, 18.1.12, 19.1.16, 20.1.11, and 21.0.4.
A vulnerability exists in the Nextcloud Team Folders (Groupfolders) application, affecting versions 17.0.0 prior to 17.0.15, 18.0.0 prior to 18.1.12, 19.0.0 prior to 19.1.16, 20.0.0 prior to 20.1.11, and 21.0.0 prior to 21.0.4. The issue allows users with READ and CREATE permissions, but without UPDATE permissions, to rename files in team folders. This bypass of rename restrictions is due to inadequate rule checking in the application's access control list (ACL) management.
Users are advised to update the Nextcloud Team Folders (Groupfolders) app to version 21.0.4, 20.1.11, 19.1.16, 18.1.12, or 17.0.15. Alternatively, the Team Folders app can be disabled.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Jun 1, 2026CISA-ADP
Assessed Jun 1, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/nextcloud/groupfolders/pull/4361 | [email protected] | Issue TrackingVendor |
| https://github.com/nextcloud/security-advisories/security/advisories/GHSA-wx2x-822r-rvmf | [email protected] | AdvisoryRemedyVendor |
| https://hackerone.com/reports/3540673 | [email protected] | Issue TrackingPermission Required |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-284 | Improper Access Control | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Nextcloud | >= 17.0.0, < 17.0.15 (semver) >= 18.0.0, < 18.1.12 (semver) >= 19.0.0, < 19.1.16 (semver) >= 20.0.0, < 20.1.11 (semver) >= 21.0.0, < 21.0.4 (semver) |
CPE
Remediation
| |
| Nextcloud Team Folders | >= 17.0.0, < 17.0.15 (semver) >= 18.0.0, < 18.1.12 (semver) >= 19.0.0, < 19.1.16 (semver) >= 20.0.0, < 20.1.11 (semver) >= 21.0.0, < 21.0.4 (semver) |
CPE
Remediation
| |
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 22, 2026 | CVE Translated | [email protected] |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Jun 1, 2026 | New CVE Received | [email protected] |