Nextcloud Server up to 32.0.8/33.0.2 authorization

Summaryinfo

A vulnerability, which was classified as problematic, was found in Nextcloud Server up to 32.0.8/33.0.2. Affected is an unknown function. The manipulation results in authorization. This vulnerability is known as CVE-2026-45285. It is possible to launch the attack remotely. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in Nextcloud Server up to 32.0.8/33.0.2. Affected is some unknown functionality. The manipulation with an unknown input leads to a authorization vulnerability. CWE is classifying the issue as CWE-862. The product does not perform an authorization check when an actor attempts to access a resource or perform an action. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Nextcloud is an open source content collaboration platform. From versions 32.0.0 to before 32.0.9, and 33.0.0 to before 33.0.3, when a user shares a folder or file with a Nextcloud Team that includes an external member (a person added via email address who does not have a Nextcloud account), the system automatically creates a public link for that external member. This public link is not displayed in the share section of the folder, so the folder owner has no knowledge of its existence. It is sent via email to the external member. It grants the same permissions (read, write, delete, reshare, download) as the Team’s access. An attacker who receives or intercepts this link can access, modify, delete, reshare, and download all data in the shared folder without any further authentication. The folder owner cannot see or revoke the link through the normal sharing interface. This issue has been patched in versions 32.0.9 and 33.0.3.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-45285 since 05/11/2026. The exploitability is told to be difficult. It is possible to launch the attack remotely. There are neither technical details nor an exploit publicly available.

Upgrading to version 32.0.9 or 33.0.3 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.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Cloud Software

Vendor

• Nextcloud

Name

• Server

Version

• 32.0.0
• 32.0.1
• 32.0.2
• 32.0.3
• 32.0.4
• 32.0.5
• 32.0.6
• 32.0.7
• 32.0.8
• 33.0.0
• 33.0.1
• 33.0.2

License

• open-source

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

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• 🔒
• 🔒

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Once again VulDB remains the best source for vulnerability data.

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