4.6Medium
CVE-2026-45284Nextcloud: Wrong condition in the User OIDC app's LdapService allowed deleted LDAP users to authenticate
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.
Weakness (CWE):
CWE-284
Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.
Affected products and versions
| Vendor | Product | Versions | |
|---|---|---|---|
| nextcloud | security-advisories | >= 1.3.6, < 8.4.0 | |
| nextcloud | user oidc | 1.3.6 – < 8.4.0 |
References and patches
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-79xf-ffj8-96fm MitigationVendor Advisory
- https://github.com/nextcloud/user_oidc/pull/1340 Issue TrackingPatch
- https://hackerone.com/reports/3554696
CPE matches (NVD) (1)
cpe:2.3:a:nextcloud:user_oidc:*:*:*:*:*:*:*:*≥ 1.3.6 < 8.4.0