CVE-2026-45284

HIGH EPSS 9.2%
Published Jun 1, 20264w ago · Modified Jun 17, 20261w ago
8.8 CVSS 3.1
High
Find Similar
Published Jun 1, 2026 4w ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
8.8
Exploitability
2.8
Impact
5.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
9.2% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-284

Affected Products 1

VendorProductVersionRange
nextclouduser_oidc*≥1.3.6  –  <8.4.0

References 3

  • github.com https://github.com/nextcloud/security-advisories/security/advisories/GHSA-79xf-ffj8-96fm
    MitigationVendor Advisory
  • github.com https://github.com/nextcloud/user_oidc/pull/1340
    Issue TrackingPatch
  • hackerone.com https://hackerone.com/reports/3554696
    Permissions Required

Remediation

  • github.com https://github.com/nextcloud/user_oidc/pull/1340
    Issue TrackingPatch