Nextcloud Server up to 31.0.11/32.0.2 authorization

Summaryinfo

A vulnerability was found in Nextcloud Server up to 31.0.11/32.0.2. It has been rated as problematic. This issue affects some unknown processing. The manipulation leads to authorization. This vulnerability is referenced as CVE-2026-45810. Remote exploitation of the attack is possible. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Nextcloud Server up to 31.0.11/32.0.2 and classified as problematic. This issue affects an unknown function. The manipulation with an unknown input leads to a authorization vulnerability. Using CWE to declare the problem leads to CWE-639. 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. Impacted is confidentiality. The summary by CVE is:

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

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-45810 since 05/13/2026. The exploitation is known to be easy. The attack may be initiated remotely. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available.

Upgrading to version 31.0.12 or 32.0.3 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Cloud Software

Vendor

• Nextcloud

Name

• Server

Version

• 31.0.0
• 31.0.1
• 31.0.2
• 31.0.3
• 31.0.4
• 31.0.5
• 31.0.6
• 31.0.7
• 31.0.8
• 31.0.9
• 31.0.10
• 31.0.11
• 32.0.0
• 32.0.1
• 32.0.2

License

• open-source

Website

• Product: https://github.com/nextcloud/server/

CPE 2.3info

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CPE 2.2info

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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