Medium 4.6Published Jun 1, 2026

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

Updated under an hour ago (Oct 26, 2026, 11:20 PM ET)

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It affects nextcloud security-advisories and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for nextcloud security-advisories

Exploited in the last 30 days

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.

CVSS: 4.6 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:L
Weakness (CWE): CWE-284
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Jun 2, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

nextcloud security-advisories nextcloud:security_advisories (from the name)	from 1.3.6, < 8.4.0	CNA record
nextcloud user_oidc nextcloud:user_oidc	from 1.3.6 before 8.4.0	NVD

References

References

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-79xf-ffj8-96fm	x-refsource-confirm, mitigation, vendor-advisory
https://github.com/nextcloud/user_oidc/pull/1340	x-refsource-misc, issue-tracking, patch
https://hackerone.com/reports/3554696	x-refsource-misc, permissions-required

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.