CVE-2026-45154
Deferred Deferred - Pending Action
Nextcloud Collective Pages Path Traversal via Trashbin Access

Publication date: 2026-06-01

Last updated on: 2026-06-01

Assigner: GitHub, Inc.

Description
Nextcloud is an open source content collaboration platform. From version 2.6.0 to before version 4.3.0, when a previous collective pages was deleted and the collective was shared view-only, guests with access to the collective were able to access the deleted pages directly from the trashbin. This issue has been patched in version 4.3.0.
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Meta Information
Published
2026-06-01
Last Modified
2026-06-01
Generated
2026-06-21
AI Q&A
2026-06-01
EPSS Evaluated
2026-06-20
NVD
CVE-2026-45154
EUVD
EUVD-2026-33673
Affected Vendors & Products
Showing 5 associated CPEs
Vendor Product Version / Range
nextcloud collectives From 3.5.0 (inc) to 4.3.0 (exc)
nextcloud collectives From 2.6.0 (inc) to 4.3.0 (exc)
nextcloud collectives From 3.5.0 (inc) to 4.3.0 (inc)
nextcloud collectives 4.3.0
nextcloud nextcloud From 2.6.0 (inc) to 4.3.0 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-284 The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.
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Mitigation Strategies

The vulnerability can be mitigated by upgrading the Nextcloud Collectives app to version 4.3.0 or later, where the issue has been patched.

No workaround is available, so applying the update is the recommended immediate step.

Compliance Impact

The vulnerability allows view-only guests to access deleted pages directly from the trashbin, which indicates improper access control.

This improper access control could potentially lead to unauthorized access to sensitive or personal data, which may impact compliance with data protection regulations such as GDPR or HIPAA.

However, the provided information does not explicitly state the direct impact on compliance with these standards or regulations.

Executive Summary

This vulnerability affects the Nextcloud Collectives app versions from 2.6.0 up to but not including 4.3.0. When a collective page was deleted and the collective was shared with view-only permissions, guests who had access to the collective could still access the deleted pages directly from the trashbin. This is due to improper access control, allowing unauthorized viewing of deleted content.

Impact Analysis

The impact of this vulnerability is limited to unauthorized access to deleted collective pages by guests with view-only access. It does not affect data integrity or availability. The severity is rated as low with a CVSS score of 2.6. An attacker would require low privileges and some user interaction to exploit this issue.

Detection Guidance

There is no specific information provided about detection methods or commands to identify this vulnerability on your network or system.

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