Nextcloud Server 31.x-32.x: Auth Users Read All Comments
CVE-2026-45810 Published on June 1, 2026
Nextcloud: Propfind requests for file comments allowed to load comments for other files
Nextcloud is an open source content collaboration platform. In Nextcloud Server from versions 31.0.0 to before 31.0.12, and 32.0.0 to before 32.0.3, a missing check of a relation allowed authenticated users with access to any file comment, to read the content of all comments. It is recommended that the Nextcloud Server is upgraded to 31.0.12 or 32.0.3. It is recommended that the Nextcloud Enterprise Server is upgraded to 21.0.9.20, 22.2.10.35, 23.0.12.31, 24.0.12.30, 25.0.13.25, 26.0.13.22, 27.1.11.22, 28.0.14.13, 29.0.16.10, 30.0.17.5, 31.0.12 or 32.0.3
Vulnerability Analysis
CVE-2026-45810 is exploitable with network access, requires user interaction and a small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a high impact on confidentiality, with no impact on integrity and availability.
Weakness Type
What is an Insecure Direct Object Reference / IDOR Vulnerability?
The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.
CVE-2026-45810 has been classified to as an Insecure Direct Object Reference / IDOR vulnerability or weakness.
Affected Versions
nextcloud security-advisories:- Version >= 31.0.0, < 31.0.12 is affected.
- Version >= 32.0.0, < 32.0.3 is affected.