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CVE-2026-45284 Details

Description

Nextcloud is an open source content collaboration platform. From version 1.3.6 to before version 8.4.0, an improper check allowed users that where provided by LDAP to still authenticate towards user OIDC after they where deleted. This issue has been patched in version 8.4.0.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:8.8 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CNA: [email protected]CVSS-B:4.6 MEDIUMVector:CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:L

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-79xf-ffj8-96fm	[email protected]	MitigationVendor Advisory
https://github.com/nextcloud/user_oidc/pull/1340	[email protected]	Issue TrackingPatch
https://hackerone.com/reports/3554696	[email protected]	Permissions Required

Weakness Enumeration

CWE-ID	CWE Name	Source
NVD-CWE-noinfo	Insufficient Information to Classify Weakness	[email protected]
CWE-284	Improper Access Control	[email protected]

Affected Products

Product	Versions
nextcloud user oidc	>= 1.3.6, < 8.4.0
CPE cpe:2.3:a:nextcloud:user_oidc:::::::: Remediation No remediation found in references.

Change History

5 change records found show changes

Date	Action	Recorded By
Jul 22, 2026	CVE Translated	[email protected]
Jun 17, 2026	CVE Modified	[email protected]
Jun 17, 2026	CVE Modified	CISA-ADP
Jun 3, 2026	Initial Analysis	[email protected]
Jun 1, 2026	New CVE Received	[email protected]