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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.

PUBLISHED Reserved 2026-05-11 | Published 2026-06-01 | Updated 2026-06-02 | Assigner GitHub_M




MEDIUM: 4.6CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:L

Problem types

CWE-284: Improper Access Control

Product status

>= 1.3.6, < 8.4.0
affected

References

github.com/...sories/security/advisories/GHSA-79xf-ffj8-96fm

github.com/nextcloud/user_oidc/pull/1340

hackerone.com/reports/3554696

cve.org (CVE-2026-45284)

nvd.nist.gov (CVE-2026-45284)

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