CVE-2026-45284 MEDIUM

CVE-2026-45284: Nextcloud: Wrong condition in the User OIDC app's LdapService allowed deleted LDAP users to authenticate

Vendor Nextcloud
Product security-advisories
Weakness CWE-284
Published June 1, 2026
Last update June 2, 2026
View on NVD All CVEs

CVSS base score

4.6/10
Attack vector Network
Attack complexity High
Privileges required Low
User interaction Required
Confidentiality Low
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:L

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

June 1, 2026 CVE published
June 2, 2026 Record updated