CVE-2026-45159: Authorization Bypass Through User-Controlled Key

Nextcloud is an open source content collaboration platform. From versions 1.15.0 to before 1.15.4, 1.16.0 to before 1.16.3, 1.17.0 to before 1.17.1, and 1.18.0 to before 1.18.1, a malicious user with access to an end-to-end encrypted files drop link was able to also drop files into other end-to-e...

Weak Encryption

nextcloud-desktop is vulnerable to Weak Encryption. The vulnerability allows a malicious server administrator to recover and modify contents of end-to-end encrypted files...