Description
The Nextcloud Desktop Client is a tool to synchronize files from Nextcloud Server. Starting with version 3.0.0 and prior to version 3.6.5, a malicious server administrator can recover and modify the contents of end-to-end encrypted files. Users should upgrade the Nextcloud Desktop client to 3.6.5 to receive a patch. No known workarounds are available.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
nextcloud security-advisories
>= 3.0.0, < 3.6.5affected
References
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-4p33-rw27-j5fc ↗
- https://github.com/nextcloud/desktop/pull/5324 ↗
- https://ethz.ch/content/dam/ethz/special-interest/infk/inst-infsec/appliedcrypto/education/theses/report_DanieleCoppola.pdf ↗
- https://lists.debian.org/debian-lts-announce/2025/09/msg00018.html ↗