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CVE-2026-45285

Nextcloud: Hidden Public Link creation when sharing to a Team External Member

MEDIUM
6.4
CVSS Score
Published: June 1, 2026 at 04:57 PM UTC
Updated: July 22, 2026 at 08:27 AM UTC
1 product affected across 1 vendorNextcloud/server

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Severity
MEDIUM6.4
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Nextcloud/server· Nextcloudnextcloud-app
95%
32.0.0 ≤ v < 32.0.933.0.0 ≤ v < 33.0.3
Affected range stops below 32.0.9, so it looks safe — our inference, not a vendor statement
Affected range stops below 33.0.3, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (3)

x_refsource_CONFIRMVendor Advisory
Source: cverecord
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-r3xh-x86g-hw4m
x_refsource_MISCIssue TrackingPatch
Source: cverecord
https://github.com/nextcloud/circles/pull/2454
x_refsource_MISCPermissions Required
Source: cverecord
https://hackerone.com/reports/3625932

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.4MEDIUMGitHub_M
Attack Vector
NETWORK
Complexity
HIGH
Privileges
LOW
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-862

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