Medium 6.4Published Jun 1, 2026

CVE-2026-45285Nextcloud is an open source content collaboration platform.

Updated under an hour ago (2026-10-19 10:10 UTC)

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It affects nextcloud_server. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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.

CVSS: 6.4 MEDIUM (v3.1, NVD)CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:N
Weakness (CWE): CWE-862
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Analyzed
Record last updated: Jul 22, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

nextcloud nextcloud_server nextcloud:nextcloud_server	from 32.0.0 before 32.0.9; from 33.0.0 before 33.0.3; from 32.0.0 before 32.0.9; from 33.0.0 before 33.0.3	NVD

References

https://github.com/nextcloud/circles/pull/2454issue-tracking, patch
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-r3xh-x86g-hw4mvendor-advisory
https://hackerone.com/reports/3625932permissions-required

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.