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CVE PROGRAM SOURCE RECORD4.3 Medium

CVE-2026-45264

Nextcloud: ACL Rename Permission Bypass in Team Folders Allows Unauthorized File Renames

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Status
Published
Published
Updated
Assigning organization
GitHub_M

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

nextcloud security-advisories

  • >= 17.0.0, < 17.0.15affected
  • >= 18.0.0, < 18.1.12affected
  • >= 19.0.0, < 19.1.16affected
  • >= 20.0.0, < 20.1.11affected
  • >= 21.0.0, < 21.0.4affected

References