![CVE-2026-45264: Nextcloud: ACL Rename Permission Bypass in Team Folders Allows Unauthorized File Renames [MEDIUM] CVSS 4.3 Exploit Intelligence — Recent CVEs / 3h 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](https://exploit-intel.com/static/brand/og-default.png)
Back exploit-intel.com CVE-2026-45264: Nextcloud: ACL Rename Permission Bypass in Team Folders Allows Unauthorized File Renames [MEDIUM] CVSS 4.3 Exploit Intelligence — Recent CVEs / 3h 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
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.
The full story
This article is one source in a clustered incident — the cluster page carries the summary, timeline and every other outlet covering it.
