Title: Nextcloud, Description: Nextcloud es una plataforma de colaboración de contenido de código abierto. En Nextcloud Server desde las versiones 32.0.0 hasta antes de la 32.0.9, y 33.0.0 hasta antes de la 33.0.3, un atacante autenticado puede acceder a los archivos adjuntos de los enlaces compartidos al conocer el token de compartición, eludiendo la protección por contraseña o las restricciones de descarga. Es aplicable a cualquier archivo que se comparta directamente, ya que el atacante solo necesita conocer un documentId de su propiedad, además del token de compartición mencionado. Para las carpetas compartidas, el atacante tiene que conocer o adivinar un documentId de un archivo que esté incluido dentro de la carpeta, lo que hace que sea mucho más difícil de explotar. El atacante solo puede extraer un archivo adjunto, pero no el archivo o la carpeta compartida en sí. Se recomienda que el Nextcloud Server se actualice a la versión 33.0.3 o 32.0.9. Se recomienda que el Nextcloud Enterprise Server se actualice a la versión 33.0.3, 32.0.9, 31.0.14.5, 30.0.17.9, 29.0.16.16, 28.0.14.17 o 27.1.11.5.

{"timestamp":"2026-06-01T19:28:33.016749Z","id":"CVE-2026-45282","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}

[{"vendor":"nextcloud","product":"security-advisories","versions":[{"version":">= 32.0.0, < 32.0.9","status":"affected"},{"version":">= 33.0.0, < 33.0.3","status":"affected"}]}]

NVD-CWE-noinfo

OR
          *cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:-:*:*:* versions from (including) 32.0.0 up to (excluding) 32.0.9
          *cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:-:*:*:* versions from (including) 33.0.0 up to (excluding) 33.0.3

OR
          *cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:* versions from (including) 29.0.0 up to (excluding) 29.0.16.16
          *cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:* versions from (including) 30.0.0 up to (excluding) 30.0.17.9
          *cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:* versions from (including) 31.0.0 up to (excluding) 31.0.14.5
          *cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:* versions from (including) 32.0.0 up to (excluding) 32.0.9
          *cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:* versions from (including) 33.0.0 up to (excluding) 33.0.3
          *cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:* versions from (including) 28.0.0 up to (excluding) 28.0.14.17
          *cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:* versions from (including) 27.0.0 up to (excluding) 27.1.11.5

GitHub, Inc.: https://github.com/nextcloud/security-advisories/security/advisories/GHSA-35fx-69q6-xpjr Types: Mitigation, Vendor Advisory

GitHub, Inc.: https://github.com/nextcloud/text/pull/8499 Types: Issue Tracking, Patch

GitHub, Inc.: https://hackerone.com/reports/3577244 Types: Permissions Required

Nextcloud is an open source content collaboration platform. In Nextcloud Server from versions 32.0.0 to before 32.0.9, and 33.0.0 to before 33.0.3, an authenticated attacker can access attachments of link shares when knowing the share token, circumventing password protection or download restrictions. It is applicable to any file that is shared directly, as the attacker only needs to know a documentId they own, apart of the mentioned share token. For shared folders the attacker has to know or guess a documentId of a file that is included inside the folder, making it much harder to exploit. The attacker can only extract an attachments, but not the file shared file or folder itself. It is recommended that the Nextcloud Server is upgraded to 33.0.3 or 32.0.9. It is recommended that the Nextcloud Enterprise Server is upgraded to 33.0.3, 32.0.9, 31.0.14.5, 30.0.17.9, 29.0.16.16, 28.0.14.17 or 27.1.11.5

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

CWE-284

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-35fx-69q6-xpjr

https://github.com/nextcloud/text/pull/8499

https://hackerone.com/reports/3577244