PT-2026-45475 · Nextcloud · Security-Advisories

Published 2026-06-01 · Updated 2026-06-01 · CVE-2026-45264

NVD

CVSS v3.1

4.3

Medium

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

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.

Fix

Improper Access Control

Weakness Enumeration

CWE-284

Related Identifiers

CVE-2026-45264

Affected Products

Security-Advisories

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-45264 · Security Note
• https://github.com/nextcloud/groupfolders/pull/4361 · Note
• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-wx2x-822r-rvmf · Note
• https://hackerone.com/reports/3540673 · Note