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
- Nextcloud Security-advisories — versions >= 1.3.6, < 8.4.0
- Nextcloud User_oidc
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Mitigation, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC, Issue Tracking)
- security-advisories@github.com (Permissions Required, x_refsource_MISC)
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.