Vulnerability in Nextcloud Security-advisories

CVE-2026-45284

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 issu…

EPSS: 0.000 (11.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.6 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:L.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-45284?
CVE-2026-45284 is a medium-severity vulnerability in Nextcloud Security-advisories, classified under Improper Access Control. CVSS score: 4.6/10. Published 2026-06-01.
How severe is CVE-2026-45284?
Medium severity. CVSS v3 base score is 4.6 out of 10.