CVE-2017-0887: Nextcloud Server

Medium severity, CVSS 4.3. EPSS: 0.9% chance of exploitation in the next 30 days.

Nextcloud Server before 9.0.55 and 10.0.2 suffers from a bypass in the quota limitation. Due to not properly sanitizing values provided by the `OC-Total-Length` HTTP header an authenticated adversary may be able to exceed their configured user quota. Thus using more space than allowed by the administrator.

Affected products

• Nextcloud Nextcloud Server: before 9.0.55 (fixed in 9.0.55); from 10.0.0, before 10.0.2 (fixed in 10.0.2)

Published 2017-04-05. Last modified 2026-06-17.